Apparently, there was a huge jump in developers on the PS4 from
126 back in Feb to 505 post-E3.
It's directly from Sony so there's a chance the numbers aren't completely honest, but still... it's good to see that developers also like the system. I'm sure the really big developers will be on both systems, but smaller developers are never a bad thing.
Other good news: 30 1st party games in development, of which 12 are new IPs, and 20 of those 30 will be out within a year of release.
I'm sure there will be delays, but even if Sony can release 10 games in the first year, that would be a incredible.