Platformers are not dieing. Yes, there are probably fewer pure platformers, Mario is probably the only big one, but Uncharted 2, inFamous and Ratchet and Clank are all platformy games even if they are not pure platformers and certainly Uncharted has sold well
jRPGs are struggling. Most Japanese developers are diverting more of their resources to titles aimed at the Western Market due to the issues with the Japanese market. This can been seen by what SE is up to with Nier and Order of War. Of course, things like DQ, FF and KH are still going to sell well, and it is certainly not on the point of extinction, though it is contracting







