Glad to see I'm getting referenced now. How gratifying!
My sanity is as intact now as it ever was. But then again I haven't taken a look at any 910s yet. I'm waiting for my local high-end store to get one in so I can go play with it and report back. I have to say, I'm kind of hoping that I'll be underwhelmed by it, that way I won't have to decide between having a 34" with a flat screen and better resolution and having a 38" with a curve and the most gorgeous colors on the market. An impossible decision to make, to be sure. Maybe I'll just say F--- it all and go buy a Panasonic plasma...
As far as 720p goes, you're not realistically gonna find any direct-views that support it natively. This isn't such a big deal, as there is very little 720p content out there, and (based on personal experience), watching it side-converted to 1080i produces next to no appreciable change in picture quality.
It's not a question of pure resolution in terms of supporting 720p. The signal requires a higher scan rate than does 1080i (which, in terms of the scan, is equivalent to 540p to your TV's electronics). That's why a lot of TVs don't support it. It requires higher-grade internal electronics to produce, and that costs money for a very questionable degree of benefit. The only direct-views I'm aware of that support 720p are the monivision-based monitors, a Sampo 34" from a couple of years ago that wasn't all that great a TV, and many of the digital displays (Plasma will accept it and convert to some variation of 768p, unless it's ED, in which case it becomes 480p, DLP will accept and display it natively, LCD will do what plasma does, and LCoS will accept and upconvert usually to 1080p or 1024p. Almost all CRTs will convert it to 1080i)
The prevailing theory regarding 1440x1080 is that it is the maximum amount of resolution you're likely to ever see on broadcast HD. It'll be HD-DVD before we can see 1920x1080, and even then only depending on what kind of filtering is done in the Datacine process). However, it is highly debatable whether you'll even be able to make out that difference in detail at 34" unless you sit under 6 feet away from it. Most people don't sit that close. Although that difference in resolution is indeed significant to those who do sit close enough to see it, internal amplification, color purity, geometry, brightness level, and SVM will all affect the perceived quality of the picture overall. In other words, you can have 1440x1080, but if the color is off, there's mad red push, the greyscale sucks, the geometry is out of whack, and the SVM is ruining your shadow detail, it's not gonna matter, because the picture is gonna suck. Which is why we can't automatically assume the XBR910 is going to kick ass. I'll get back to people when I've had a good look at the thing, and if anybody gets to it before I do, please endow us with your impressions!