> A chromebook has all the physical features of a high end professional laptop, but is 100% cloud based, and thus can be used as a real computer for real tasks.

Except it can't. There is a theoretical possible future in which everyone has 40 mbps unmetered LTE and powerful apps exist in web form, but if anything the trend has been the opposite in recent years (carriers eliminating unlimited data plans, apps moving back to native on tablets and phones).