I haven't been in the semiconducter industry since the late 90s, nor was I involved with any design education but from what I saw the problems were size as you said and replacing equipment that can work on that new size transistor. Heat generated by the smaller footprint creates new problems. The metals used also can only be reliable to a certain extent with size, price, and heat. To be honest I'm pretty happy not needing to think on that scale. Last thing I read about was some sort of stacked design (although that was already the case so I'm not really sure the new aspect other than adding insulation in between layers which is also old technology). The comment on projecting displays, microsoft will likely start to publically support the already working xbox gesture thing (can't remember product name this minute) with windows. Its already had a driver created I think unofficially but I'm sure if they port it to pc it'll boost sales for both systems.