Why would anyone want their screen to be anything other than a featureless rectangle?
There's a huge market for making TVs look like anything other than a slab of glass. Aesthetics count. Is why the 17 inch iMac with the crane neck is still covered.
For what it's worth I don't think featureless rectangles are a bad thing. I'm just saying that it gets hard to distinguish products from each other when the designs converge so much.
If they had the tech, they would have done this a long time ago.