Sure, we have a ways to go - to finding home use of these, but Im sure there is gonna be more and more usefullness to this. But more technologies are implementing the touch factor:
microsoft 01 | 02, iphone (& other cellphone that are similar), Dell, the itable, and OLEDs. And that in turn increases the need for applications that use this technology. Remember the interactive ui in Minority Report - or Johnny Mnemonic? What it may come down to is - ease of use and interaction.