My house would be powered by some kind of strange quantum computer thing, which can cook as well as do computer stuff cos it's got arms. In each room there'd just be a screen and input device and the computer would know what you had access to and present you with your own personalised display.
I'd also have a portable version that automatically connects via wifi to whateverI was in or near, cars, elevators, hot air balloons etc.
Ok maybe not by 2021, but someday I tell you. And I will have a jetpack.
Most likely I'd have whatever was two years out of date and runs like a three legged camel. Just like today
