Actually, this is a teaser for the trailer; not a trailer itself. It's just designed to show the tiny bits that are already done - the trailer is to come later. /nitpicking
I have mixed feelings about this. On the one hand, the 12-year-old in me that saw the original three in the theatres was overjoyed to see the Millennium Falcon and such. I still have memories from Return of the Jedi as well, so seeing the continuing adventures is something I really look forward to. I think the prequels were ... subpar at best, so this being in the hands of someone else - even JJ Abrams under Disney - might be a breath of fresh air. Plus: soccer ball droid.
Also, no one anywhere on the internet can stop talking about the light saber crossguards. This is an issue that will divide the planet!