I've got one of the first edition LCD 56" 21:9 Philips TVs, which I got cheap when they released the current model. All I can say is, before you spark off about how pointless Ambilight is, or useless 21:9 is, or how the upscaling will ruin the picture, just try viewing one.
I thought all the same things, and then I gave one a viewing, and they are simply amazing. The upscaling is really, really, good. I simply can't tell from the image quality whether it's native resolution or upscaled. The Ambilight is brilliant. After a while you stop noticing it and it just helps draw you in to the screen. Turn it off, and the picture suddenly seems too large, imposing and eye-straining. If you don't like these features, that's fine, but they're hardly pointless and they do work well.
Yes, you do get black bars either side on 4:3 content. Yes, low quality SD content doesn't look great, but do you really expect it to on a 56" TV? On decent DVD or BluRay content, these TVs are epic.