WINE (WINE Is Not an Emulator) is a thing, it allows Windows apps and games to be run on Linux.
Compatibility and speed is ever increasing.

Nice. Call me and everyone else when compatibility is 100% perfect with 100% of Windows apps.

Will do.

There doesn't seem to be any info available for Windows 10, but in 2015, Windows 8.1 cost either $0 or $15 for tablets. Because of Windows's small marketshare in tablets, it would seem plausible that pricing there is more aggressive than it is in the case of computers. There doesn't seem to be more recent data available on how much Windows costs for computers, but in 2012, Windows 8 Pro + Office 2013 cost between $80 and $100. Obviously that information is no longer-up-to-date, but it might give a hint as to how much computer makers have to pay for each copy of Windows. That's definitely not a negligible sum, so I would expect that price to at least partially translate into the final price of each computer as well. Whether the lack of competition really counts as not being an extra cost or not is pretty much semantics, because essentially computers could be much cheaper if there was more competition in the OS market.

I would also like to mention that the most hyped console of this year, the SNES Classic (truly the GTAV of consoles) runs Linux.

You ever hear that saying about Porn decides which format wins in vhs/dvd/bluray/ect.

Whether that is true or not, I can tell you that the business world will decide which operating system wins, and I do not see anyone taking windows away anytime soon. Hell look how popular mac's are, yet they are still dwarfed.

Most all applications that people use at their work work best on windows. You have to lots of times go through many hoops and hurdles to use it on a mac or send a file from one person using mac to another windows, ect when using the variuous programs jobs use.

Have you ever been around when a company updated to a new windows? Or hell just a new version of the program people use everday. It's not easy. People do not like change. It takes months and months of prep work and making sure every program you use works with the new update and you won't run into problems. You can't have your 100+ employees all of a sudden not able to do their work cause of an IT problem with a new OS.

everywhere I work, the updates for programs are like 2 updates behind current. They like to make sure all the kinks and bugs are out before switching. Don't even think about the OS. A couple years ago the place I was was using windows xp still.

SO short answer. NO, Linux will not become commonplace.

Could it fill a few laptops, tablets or phones. Sure. There are multiple OS already on those things, depending on the brand that makes said device. But Windows is going nowhere.

This.

Also with steam/gog/ect stores starting to get linux support, and stuff like emulators working too.

What more do you really need?

Basically if its easy enough to use, plays games, and you have a browser, thats enough for most people.

Hope more developers see the light and use Vulken instead of DX12.

I guess from your sig you're attempting humour, but you don't have to try to be funny if you're uncomfortable doing so.