[Kinanizer]

It's like saying the telephone won't be used anymore and instead of this we would use the Morse code.
People/companies will still buy Windows licenses just because it's easy to install and the it can be maintained easily and also it's pretty noob-friendly. Linux is Linux, Windows is Windows... doesn't matter how much the technology advances, there will always be people who can't do shit with computers, and giving them Linux as a base OS, they're gonna have a bad time.

That all depends on the distro, many Linux distros are easier than Windows.