One thing about Sony is they haven't been shy about announcing upcoming games loooong in advance. I mean GT and FFXIII which they've been boasting since '06 will finally get released in '10. So I don't see any surprise major games suddenly being unveiled for this year from Sony. However GT, FFXIII and GoDIII are already a very, very strong line-up.
It looks to be a great year for all three systems. It'll be fun to watch how it unfolds.