The real question is if Abrams understands the difference between one SF franchise and another. I liked the Star Trek remake to some extent, but if he uses the same style and pacing (lots of running along corridors and shouting) the SW remake might suck.
Star Wars was always about the pacing - action scenes but also character development and stuff like jedi philosophy. Star Trek had none of that, it was a themepark ride with little depth.
I disagree. Watch the Red Letter Media review on the new Star Trek. He makes a pretty compelling point that the mistake JJ Abrams did with the new Star Trek was make it more like Star Wars (less focused on technical details, more science fantasy then science fiction, faster paced.)