I am sure it will happen, but the cost effectiveness and efficiency will drop so dramatically going from 1 wafer to just 2 wafers. 1 wafer, doing X work, in Y

I am sure it will happen, but the cost effectiveness and efficiency will drop so dramatically going from 1 wafer to just 2 wafers. 1 wafer, doing X work, in Y time = 1 wafer, doing 2X work, in 2Y time = Two wafers, doing 2X work, in something still close to 2Y time I.e. the slowness of between-wafer communication, vs. in-wafer communication, will dwarf the computing time. Obviously there is some N, where N wafers would be worth clustering, but it might be quite high. Maybe the company is working on ways to cut down cross-wafer communication too. Vertical optical connections for instance would be awesome.