Hacker News Reader

Really? You are speculating about 42'' phones being produced in bulk?

I think he's speculating more about 42" multitouch surfaces being produced in bulk.

I think projectors with sensors on the board are more likely to be mass-produced. I've been seeing them since 2007 at the latest.

Not mass-produced, but an "open source" kit for making multi-touch: http://labs.nortd.com/touchkit/.