Mouse + keyboard + big screen computers aren't going anywhere anytime soon. When they start to migrate office workers to appstore devices rather than computers then I'd believe you, but todays appstore devices doesn't offer enough to replace computers.

> Mouse + keyboard + big screen computers aren't going anywhere anytime soon.

Yeah, and people still ride and otherwise use horses and hunt and gather, and cars are older than smartphones and agriculture is much older.

The niches shrink, though.

The issue is that computers haven't been replaced. iPhones still use files and directories, people just aren't allowed to look at all of them. They're being kept ignorant of how the device they use actually works.