At least Star Wars won't suck anymore. Maybe we'll get back to that "original trilogy" level of fun and quality (Return of the Jedi notwithstanding). As for Star Trek, if Paramount is okay with the wait, Abrams will probably direct the third film. But if he wants to do his own personal projects in between, that wait might be too long in their eyes. So being the producer with an approved director would be the way to go. I'd be okay with that.
Honestly, I think this is win-win.