Eh, I think there's a fundamental difference in the franchises, that makes Abrams a much better fit for Star Wars than he was for Star Trek. Because the two franchises are important and enduring for completely different reasons.
Here's a little trivia about Star Wars... and I don't say this to bash Star Wars. I love Star Wars too (heck, I even kind of liked the prequels in their own way), but there are a couple things you need to keep in mind:
The original Star Wars began as a pitch for a Flash Gordon adaptation that Lucas wanted to make. When that got turned down, George Lucas instead decided to slap on new character names and make it an original property. And all the time he was writing, by his own admission, he was going by the Joseph Campbell checklist for the story and character points. Star Wars was awesome, it thrived on its world-building and the stock characters were played in endearing ways... but it wasn't sophisticated. It wasn't about ideas. It was "Lord of the Rings IN SPACE," only with less running time to explore the various interesting places that might have gone.
And yes, Star Trek wasn't exactly intellectual fare in its first couple iterations, but it grew into something more interesting, something almost approaching sophistication, later on (though it certainly took it a while). Star Wars was content to remain a space fairy tale throughout its entire history.
No, Abrams wasn't my first choice either. I would have picked Joe Johnston, if only because Johnston is the best at taking a giant pile of clichés and turning them into a watchable film (which he's been doing his entire career). But if you're worried about Abrams ripping off Top Gun, well, the Star Wars franchise lends itself much better to that kind of story.
Besides, they've got Arendt writing instead of the Bayformers guys.