My money is on massive FPGAs, think a whole wafer of silicon with just a bunch of general purpose IO and power. Once stuff like that becomes available at a rea

My money is on massive FPGAs, think a whole wafer of silicon with just a bunch of general purpose IO and power. Once stuff like that becomes available at a reasonable price (a big FPGA will cost you a lot of money at the moment) open hardware will be as simple as downloading a bitstream on to your 'general purpose' rig.