If you count Android as Linux (I don't, personally) then Linux is practically "everybody's OS".
If you don't count Android as Linux, then Linux is still doing what it's always done: Slowly erode Windows' userbase. Only this time, there are other things eroding Windows too.
I personally believe that you only get viruses on Windows if you're an idiot, or if you don't use your brain before downloading and running a program and what you download is actually a trojan. Crashes? I don't experience many on Windows systems, funnily enough I find Windows practically never hibernates or suspends without crashing. Data loss is usually due to bad hard drives, and of course they will lose data no matter the operating system you use.
I use Linux because it's simply a nicer system to work in. Very trouble-free, easy to use, and has some pretty helpful features. You can put Linux onto any general-purpose computer, which is very handy; it wasn't so long ago that I lost my Windows 7 CD and my partner had to be without Windows for a week. If I lose my CD of the latest Ubuntu, I can just download another one.
Is Linux the OS of the future? Maybe. But it's probably just as likely to be the OS of the present, and something else will come along later. I think we're seeing Ubuntu becoming its own home-grown vertical platform instead of incorporating other traditional pieces of the Linux stack. Possibly Ubuntu will be the successor to the ordinary Linux desktop, eventually. That would make Ubuntu the OS of the future, and Linux the OS of the past.