It is a little early, I think, to "reboot" TNG for anything, TV or movies. The show finished its run on TV only about 18 years ago. TNG is still fresh enough that it would be impossible to sit and watch the show without comparing it to the original. TOS could get rebooted in movie form not just because it has been about 45 years since the original aired, but because the whole approach to its presentation changed. TOS looks different because technology has improved, of course, but also because what we're looking for in science fiction has also changed. It hasn't been long enough to achieve that same turnover with TNG. Perhaps in another 20 years TNG could be rebooted with a completely different approach, if that approach is there to be tapped for it.