Some people couldn't jump on the 3D bandwagon they just play 2D games (yea these people exist), granted for them they still make 2D games.
Some don't understand how to use the controllers since the first Playstation as the NES had 4 buttons but now controllers have more than 10 buttons plus 2 analog sticks (my father stopped there as he had a hard time following, especially with the dual analog sticks).
This generation is the worst. It brought motion gaming and as we all witness it's not everyone's cup of tea. Also japanese games are not dominant anymore like they used to and the biggest change of all will be the cloud gaming where no console will be required but only a subscription to some channel like OnLive.
A lot of people hate it when things change, especially when things change too drasticaly. The gaming industry is constantly evolving and console manufacturers constantly rethink how we should play games. Do you adapt to these changes or do you resist until you don't have a choice anymore or just give up?
Personnaly I don't care much how I play or how I get the games as long as I have fun.