It'll not become a classic but it is still a watchable movie.
Don't bet on it, it's every bit as good if not better than supposedly "classic": movies such as Omega Man, Soylent Green, Rollerball, Logan's Run, etc.
Pass some of what you're smoking over here.
It's a good movie but I doubt it, or anything made in our life time, will be a classic. Give it a few more months and the movie will be forgotten, if it hasn't been already.
I really enjoyed it, good visuals, good story, good cast, but there's nothing remotely remarkable about on a technical or story-telling level.
Actually none of the movies I named
are half as good as Oblivion.
...and yes, in today's movie landscape and multimedia blitz, movies get lost quickly, but that doesn't mean they won't be remembered or aren't "classics" to be.