What would 2gb of ram do for you besides burn up battery? OIS isnt like android. It doesnt really multi task.... I have yet to go under 300mb of UNUSED ram. Ever.
With android, they NEED 2gb of ram(well more like 1.5gb). They NEED higher clocked dual/quadcore processor because the OS is VERY dependent on the CPU. With OIS, its very dependent on the GPU. Thats why the iphones always have powerful GPU's.
So bring on a super efficient dual core cpu with an octa-core GPU!