What good is 2GB, seriously. People are pretty skeptical over 1GB on something like an 8800GT which is a more powerful card, why pump a medium-end with more memory than it can utilize? The 256-bit bus CRIPPLES it.
If your running Vista 32bit, your Ram's bus is 128bit, that handles 2GB's of ram just fine.
It's all about parallel computing. If thats what they're planning on doing with it. Turning your videocard into not just a GPU, but a CPU as well.
I have no idea if this is the plan, but it's the logical step if thats the direction they're taking. They don't have a choice in the matter really.