Just wanted to add an update on my thoughts on the TK800.
I sent the original back to Amazon as I was hoping to get one that was a newer build date and had the newer firmware, Unfortunately, the new replacement was also manufactured in April 2018 and has the original 1.00 firmware. I'm going to have to send it back to BenQ for an upgrade as I need the newer functionality, in particular the 3d modes which are promised in the manual and are not supported on 1.00.
All that said, I bought an Xbox one X with Forza Horizon 4 in anticipation and I've had a really good opportunity to use 4k in earnest, both through the Xbox, my gaming pc and online streaming. I have to say, I would never go back to a 1080p non HDR projector again.
Sky Q looks decent upscaled but feed this device a proper 4k signal and that's where it really shines. Lag could be better and I do notice it, but on a controller you can barely tell and it looks fantastic.
The XPR noise is still an issue, but for gaming, sports and most (loud) films it's not an issue. Still bugs be when watching 'normal' TV through it.
For the price I paid, I'm very happy. I wish it had less lag, less noise and supported 1920x1080x120Hz frame sequential 3d, but hopefully that will come in time with the newer models.
I have a 110" Elite screens motorized screen with 1.1 gain and the projector is absolutely more than bright enough in any conditions I've thrown at it btw.
Oh, and I'm pretty fussy but I've never even noticed the 'light border'. My screen does have a black surround but from my projection distance the border should still be visible on the wall behind, but I can't see it. Maybe it's easier to see in a fully light controlled room, but even with all the lights off in my living room I haven't noticed it.
Last edited by russellhk; 12-16-2018 at 12:35 PM.