totally agree that the logical future is a single powerful system for the house with thin clients and little baby machines for surf/browse/email/stream. most of what anyone is doing could work great on a $20 raspberry pi, but manufacturers have convinced everyone that every house needs like 3+ systems that can all do climate modeling or geospatial analysis.
if like 90% of the heavy traffic internet wasn't riddled with the latest UX complicating popups and malformed ad technology, most of the complaints of "my computer is slow" would probably vanish overnight.