I think we will easily get to 2000 SP's, there are 3072 on a 6990 so i don't see why a single card wont reach 2000. the performance is obviously needed.
What i really want to see is some serious amount of the cost savings passed on to the consumer. Now im in the UK so please realize that what is value in the USA and other places in the world is not necessarily value elsewhere.
What im talking about is a card that has GTX 450/HD 5770 performance for a sub £100 price tag. Realistically these cards should be lower by now anyway, the only reason they are not is because there was no direct replacement for the 5770 in the 6 series line up.
Say about 1200 shaders
192 bit bus
850 ish Core
1 GB GDDR5 should be plenty.