as a computer moves ever more towards a white-label appliance with a single purpose, the act of "installing" becomes more and more alien. It sucks, but a majority of the computer-using population cares not for it, and only want it to work. Think washing machine - have you ever seen people want to install apps into their washing machine?
If the singular fucking purpose of the washing machine was to run apps, I sure as fuck would expect to see people wanting to install apps on their washing machine.