I'm in justusranvier's camp on this one. Not raising blocksize, *at least* roughly allowing for Moore's Law, seems insane, and would just drive some alt to gain significant marketshare.
Bandwidth doesn't increase according to Moore's.
At best, Neilson's
http://www.nngroup.com/articles/law-of-bandwidth/This would be in time of peace, in rich nations, with good infrastructure, and other assumptions.
There is some discussion of methods to achieve this in a way that is flexible to accommodate changing conditions.
https://bitcointalk.org/index.php?topic=815712.0