For the application that I have in mind which is low cost computing alternatives for India's tech isolated millions, I think we could get by with a 320x240 reso

For the application that I have in mind which is low cost computing alternatives for India's tech isolated millions, I think we could get by with a 320x240 resolution screen which means each frame would be pretty small and we should be able to get by with 2 frames of total buffering. At 6 gates per bit, assuming a 16 bit color depth, that would be 6 x 16 x 2 x 320 x 240 which is about 15 million gates. Assuming the rest of the chip is much smaller, and assuming we fabricate on 180 nm process means chip area is about 15million x 0.18 x .18 x 10(-6) mm squared or .5 mm sq. That's a pretty small chip. The only cost we would have to control is the design cost. Over time we could figure out how to do this with say a product line.