I would say its 40% crap, 40% accessories (stuff you'd only be interested in if you're a retailer that sells that stuff), 10% vapor ware! and 10% real stuff.
If you go to the Samsung and Intel booths, you will see quite a bit of product. Much of it won't be new at all, but it's real product.
A few other areas/booths of interest:
-TV viewing ... DISH always has some good innovations. Not sure who besides TiVo and Cisco will have a booth, but it's always an area of interest.
-3D printing. Sounds like there will be quite a few displays there.
-Qualcomm and NVidia usually have interesting booths,although they are at the top of the vaporware list every year. This is the first time I can remember Qualcomm being on the main floor, so they may have something cooked up.
The main hall is mostly populated by the big Asian OEMs this year, so I doubt we are going to see anything too groundbreaking.