i believe that we will see OEM WC if the CPU's keep producing more and more heat. it is possible that a new technology could be used to make the CPU's cooler, but if it doesnt, then we'll have to resort to better cooling. what the WC kit for a regular user will be like is something like this:
- closed loop
- all-in-one kit that includes WB, rad, fan, small but powerfull 12v pump (solid state maybe?)
- short hoses that are permanently attached and sealed with the rad and WB
- new case designs could be used to make installation of these kits easier
imagine having the standard case designed with a special window cut out on the side to mount a little radiator+fan in. the hoses that run just far enough to the WB with the right amount of slack, because all CPU's are in the same area in these cases. no need to refill or do any maintenance, except maybe blowing out some dust bunnies from the radiator. this can also be replaced with a system that uses an air filter that can be cleaned easier (think clothes dryer).