I'll go see this, but only if they take out all the absolute garbage that they added to the original trilogy for the remastered special bullshit editions with all the CGI.
Different strokes, different folks, but even though I grew up with the original versions I prefer the special editions. Yeah, there was stuff added to them that I don't care for (Greedo shooting first, the stupid musical number in Jabba's Palace, and some little additions here and there), but overall I found the positives to outweigh the negatives. Plus, in their defense the tweaks to the visuals and continual remastering of the film masters have helped the films age fairly well.
As for the addition of 3D, unless Lucas plans to practically recreate the original trilogy in 3D from the ground-up (and, granted, it's Lucas and I don't doubt that he would do it), I don't see how the addition of 3D could be anything more than a stupid gimmick...no better than the addition of 3D to Last Airbender, Alice in Wonderland, etc. The prequel trilogy would probably turn out a lot better because it was practically created entirely on computers anyway. I have no doubt that Lucas had all the sets, props, etc. scanned into or created in a computer database with most of the films done on Green Screens, so it would be relatively easy to disassemble and reassemble 3D movies that make better use of the format.