How about the connector cost? Even a simple DB-9 can run into few dollars--and multi-pin locking AMP and Canon connectors sometimes cost over $100.
I am surprised how power-efficient short-range wireless can be; maybe we'll see it replace many internal and external wired connections.
Am I the only guy who hates it when people paw at my PC displays?
Besides, one of our PCs at home is a dedicated TV/audio system STB, for Internet content. Is display is the 42" HDTV. So it would be a real inconvenience to have to get up from the couch every time I wanted to do anything! And then have to deal with everyone's greasy pawprints!!
I'm looking forward to really useful touch screen hardware, where the physical desktop at work becomes an electronic touch screen. And where you can realistically have multiple documents open at the same time and actually refer to them simultaneously. Instead of using touch screens only to make a useful PC feel more like a tablet.
To you it's a hinge, to me it's a HINGE! For a notebook / tablet that sucker has to both swing up and pivot around, include a path for display power and data, maybe incorporate pivot position sensing, last darn near forever, and look pretty spiffy. Oh, and the tooling for one-off production is trashed after only 6 months of use. For an experienced metal fabricater that's a lot to ask.