Sadly, I can't give details (NDA and all that!), but just thought you'd like to know that you're not just getting updated 4th ed stuff, but new stuff as well. There's brand-new bits of cyberware alone, on top of bringing most of the 4th ed stuff in, a bit of gear not seen since 1st edition, and some wireless things.
Plus fluff, Glorious, glorious fluff.
And, chummer, the art in this is *so* pretty. I don't know where they find 'em all, but I'm tres jealous. I got ideas for at least four characters just from the art inside.
I'm hyped to get myself a copy, that's for dang sure.