Exclusives are definitely important, but too many games can be a negative to some extent. Especially when you have 3rd parties making games as well.
I love exclusives, but you have to spread your bets a little too. No point having all your exclusives releasing day 1. Regardless of if you buy MS or Sony, most gamers will probably want at least 3/4 games, thats £120 right there before we have the hardware, indie games and extra controllers etc.
I have two exclusive games i want to buy, and at least 2/3 3rd party games in AC BFlag and Watch Dogs, probably BF4. We're talking about lots of money to spread around.
So i suspect Sony has more content to come (gamescom and TGS) that wont be day 1, but will definitely be year 1. I do think Uncharted 4 will be out next Christmas.
I really don't know why either Sony or MS don't put some quick wins together in the form of Special HD updates to PS3 games (maybe as download only). I would love to buy an uncharted bundle of games which have all been upgraded to PS4 visual. I am sure there would be Fable/GOW/Halo users who would feel the same. I mean i own GTA3 on about 3 platforms, but would definitely buy it again if it was available upgraded visuals/engine to PS4.
Anyway i hope all companies have interesting games to reveal cause at the end of the day thats what its about.