It's simply too early. The product cycle is probably going to be very similar to smartphones. Two decades with lots of prototypes but negligible market impact (

It's simply too early. The product cycle is probably going to be very similar to smartphones. Two decades with lots of prototypes but negligible market impact (Apple Newton, PalmPilot, HTC P Series). Followed by a decade of rapid expansion when all the desired features can finally be implemented (like in the iPhone). We are probably still in the Newton decade.