Ok here are my notes from ISE yesterday on the Optoma UHD60&65, 3G & wifi were unusable at the airport yesterday...
The demo area was bright and a small screen <90" as seems usual for Optoma so I have no idea about black level and lens clarity. It was however much better than the Viewsonic demo which had another projector shining across the screen raising black level!
So most importantly for me I didn't see any unpleasant motion artefacts on any of the many 4k DLPs I saw, there is some indistinct movement when you are inches away but it's no more unpleasant than the DLP dithering, it's not possible to see individual pixels even close up but don't forget the Optoma screen was maybe 80". With Optoma the whole stand was shaking as people walk around so it was difficult to see focus well. The demo material was the usual BBC Planet Earth II frog & snake video, at least it was moving, Casio only had a still slideshow.
I have worked in sport TV engineering for 29 years so I am very sensitive to motion issues in TV signals and display technology, consequently I'm unable to watch LCD TVs without feeling ill, this is why I take a special interest in DLP.
I was told by Optoma that it's not possible to switch off the wobulation on the UHD60,&65, Acer & BenQ showed me the pictures in silent mode (wobulation off, maybe some different firmware choices) where you can see the individual pixels and yes they are square btw. I didn't see any change to motion rendering with wobulation on or off but all demo material was 24p so maybe it would be obvious at 50p or 60p, I think I would want the option to turn it off just in case. there was a mention (not from Optoma) that on larger screens the wobulation was easier to see.
All the vendors I spoke to told me the TI 4K DLP chipset does not support 3D or any 120Hz modes. The optical wobulator element works at 120Hz or 150Hz for 25 & 50fps, this info was a little different from each vendor so not really definitive yet. I was interested to know if that modulation was double frame rate or something much higher, perhaps this prevents 3D or 120Hz video but maybe they just didn't bother.
In all of the demos I looked for rainbows and it was very difficult or impossible to trigger this, I had varying explanations of colour wheel equivalent speed and none from Optoma but it sounded like this was a fixed thing in the initial DLP chipset so depending on explanation either 6x at 24p or 4x at 30p one even suggested 5x at 25p but I'm not sure that's possible or I misunderstood. Either way all of them seemed better than my last two DLPs, Optoma HD80 & HD30.
The UHD65 will be launched at the same June/July time as the UHD60 but the primary (only?) difference will be an RGBRGB colour wheel, the UHD60 has a RGBYCM higher brightness wheel. The 60 will be ~£2500 the 65 ~£3000. Both will be REC709 colour, when fed with 2020 colour space the projector will down convert to 709, HDR support will be on/off no more info and this was not demoed. I wasn't able to make any menu adjustments with Optoma, others were more accommodating.
In almost all cases I was very lucky to find a friendly chatty engineer who wanted to explain how this new technology works, so I think I learned a lot about the new DLP.
Everyone talked about another new 4k Ti DLP chip coming later this year this is a smaller, cheaper chip, everyone accepted that the contrast will be worse so I expect there will be a lot of cheap 4k DLPs in a few years time but with terrible home cinema performance, great for spreadsheets though.
&60hz will be max 10bit at 4:2:2, 4:4:4 is not going to be possible with this projector. One of the vendors said they have a 18Gb HDMI chip but the Ti chipset didn't permit 4:4:4 at 50 or 60Hz. From the vendors who understood the question, it doesn't seem it's going to be possible to drive the input at the native mirror resolution, shame that might a handy feature, maybe I planted the seed of an idea in some of the engineers minds. The BenQ guy at least wanted to stay in touch and discuss developments that might be relevant to sports TV.
I asked about CIH, Optoma said all their projectors support stretching for anamorphic lenses but didn't really understand about using zoom for CIH. Zoom ratio is 1.6 so it might be possible (need 1.5 min) but there is a minimum lens offset (can't go to zero) and not much vertical adjustment so it might depend on screen distance and offset.
There is also a ZH55 model being launched but I didn't see a demo, static model only and I didn't get told any details.
So this is what I discovered, there's more from the other vendors I saw, Casio, Viewsonic, Acer, BenQ, I wasn't able to compare with Epson, Sony or JVC as they didn't have any Home Cinema projectors on demo I did see the JVC Z1 demo.
Acer had a small living room style 4k projector on demo too, VHE7850 (I think, translation was difficult) which actually looked brighter and better contrast than the V9800 along side, who knows really it's a trade show demo in a bright room. Few details and no price yet, might be a low price alternative to watch for if the Optoma doesn't live up to expectations when it gets released and properly reviewed.