> everybody and their kids have a device, and often, those devices are talking to each other
The inter-device communications are just part of the app, another way of describing the cloud.
The ubiquitous embedded device is as unimportant to the PC as the wristwatch. I still don't think a wrist computer (or an iPad) will be so dominant people say, "remember when we used to use keyboards?"
Everyone may have a "device," but they will still use their laptop every day.