>There are dozens of products that will give you everything you want
Thats why one starts a argument like that by listing said products.
Examples would need to have a few specific qualities like:
-Being able to run 480p/i without degrading quality
-No input lag
-Black and white levels
So far, the first point is a very huge problem. LCD has no scaling capabilities, before you reach a 4-5x resolution. The second problem is a huge one, since there is no industry standard for it, so there is no way of avoiding it.
BW levels can sorta be solved by OLED, which is neat.
Saturnation levels is a huge problem. The general trend seem to be for LCD's to either low degrade on view angle, good saturnation, or okay white levels.