2.x is a huge improvement (along with more thorough despecialization, there's greatly improved theatrical color fidelity and much less compression). And that's just on the video side.

Whether you can wait or not is up to you. If you wait for the whole trilogy to reach 2.x, you'll be waiting a long time.

EDIT: If it helps you decide, watching 1.x merely makes you feel like you're watching something better than the best official home video version of Star Wars ever made. Watching 2.x makes you feel like you're in the theatre on opening day in 1977. It's that good.