It would be awesome if Sony released sequels to their first and second biggest franchises within 3 years of the PS4's launch. GT6 releasing in 2014 sounds good and God of War: IV releasing in 2015 would be perfect, both games are capable of passing 6 million units sold (GoWIII will do it easily, it's already at 5.25m+ in only 2 1/2 years) without mass bundling and will be huge system sellers. I wouldn't put such significance on the Uncharted franchise because without mass bundling it would just be on the high end of a medium sized franchise (2.0-4.5 million) just like Killzone/ Resistance/ LittleBigPlanet/ inFAMOUS etc.
Hopefully Naughty Dog abandons Uncharted and lets another developer milk it so they can create a new AAA IP that isn't as generic as hell. I want something oozing with creatively, something unique and imaginative with a deep mythology and interesting characters, most importantly it should be spectacular but it should primarily focus on SUBSTANCE OVER SPECTACLE .
I would like Sony Santa Monica to split into 2 studios and create a another AAA IP whilst also helping indie developers with games like Journey, Flower and The Unfinished Swan etc. Sucker Punch should create a new IP for 2014. Media Molecule should create a new IP for 2015 and let another developer create LittleBigPlanet 3 for a 2014 release. Guerrila Games should make Killzone 4 for 2015 and consider creating a new IP if the franchise doesn't grow significantly enough from past games.
I'll only buy a PS4 when God of War IV is announced/ released but if most of the above is announced to happen I would consider picking one up earlier... unless the Xbox 720 wins me over and I buy that first like I bought a 360 before the PS3.