IMO, SLI is a waste.
It's for the ridiculously rich or slightly insane
The dual GPU card is a better step in the right direction, BUT, I hope this 'dual' anything is just a temporary phase. Instead of making a card absurdly hot, and power consuming, and on top of that making a system that'll hold two, in which you gotta get a 600w+ power supply which those are ridiculously priced, they need to start investing tons of money into alternative solutions besides simply 'doubling it up'
Less power consumption, less heat, and more processing is the goal they need to obtain.
Everything is getting too hot, and like has been said in another thread, soon water cooling will have to become the norm and at their current rate, hell Vapochill will be needed and by 2020 a vapochill will only keep the CPU at like 20C
yeah yeah a bit of a stretch I know.
Main point is instead of doubling up things that are already pricey, hot, and power eaters, they need to focus on bringing that power consumption down, the heat WAY down, and processing up...Hell if they could create a 6800Ultra that used half the power and only got up to 40C on full load I'd be massively impressed.