Please, let me be clear : the platform reviewed was equipped with an Atom 230, not a 330, as is perfectly obvious from the pictures (one single die on the CPU package).
And, yes, it's powerful enough (thanks to the 9400M) to smoothly playback a BD like Casino Royale (including the HDCP decryption). CPU utilization rose to around 67 % during that test.
And even though the Ion ref platform is kind of a nettop (and we tested it with that in mind, comparing it to Intel's nettop platform), it could also fit in a netbook since 9400M TDP is very close to that of Intel 945GSE chipset that is found in most netbooks today : 12 W compared to 9,3 W. Nvidia and its partners would just need to drop 9400M's frequency a bit.