FUD Zilla has some more info about NVIDIA's upcoming ION2 platform:
The main task of Ion 2 or next generation Ion how Nvidia calls it will be to take care of the graphics part. Since next generation Ion should have 40 shaders, it should be more than twice as fast as the original Ion.
We also heard that there won’t be more than one variant. Ion will be a single chip with the same clocks and specification, at least at the introduction time, and later Nvidia might change its mind and launch an even faster version of the chip.