A 64-bit link to a 512MB frame buffer at 800MHz (that last is a guess) doesn't sound like much, but it'll give the NG Ion GPU 6.4GBps of memory bandwidth compared to the 3GBps available to a standard Pinetrail system. NVIDIA claims these improvements boost NG-Ion's performance up to 100 percent above its predecessor.
Oddly, NVIDIA doesn't specify if we'll see NG-Ion paired up with Intel's Atom Z550 or the N470. At 2GHz (Z550) and 1.83GHz (N470), these are the two fastest Atom processor's Intel has released. Given the diminutive processor's similarly diminutive performance the faster speed bins would seem to be quite desirable pairings for NG-Ion.
So far we have the NG-Ion GPU—a faster Ion manufactured on a more advanced process with a sizable frame buffer, DX10.1 support, and one more thing—a sexy new power-saving feature named Optimus.