I can't wait. I've seen a "topdown" looking level for LBP3 with a snowman, so I think for the most part, even if we can't us actual sackboys, we're still in business. We might just have to be creative. I used inLBP2 "creatinators" and some fancy connections to create top down "bodies" like this:
https://www.youtube.com/watch?v=_qRfziukTCk
and
https://www.youtube.com/watch?v=IvbAzaiGlQ0 this.
But I'd MUCH rather have a real sackboy and be able to use the other characters so that I can properly animate them in a top-down game. The old method was VERY time consuming and I'll honestly admit, didn't look that fantastic, but it was the best I could do.
I'm just so happy that they're embracing top-down popularity! :)