Linux already has those features ...
Yes but you still can't play decent games on it, or use Photoshop or use any decent sound- or video-editing applications on it. A lot would be possible, but it isn't. Practice vs theory.
Linux also doesnt suffer from the many issues and infections Windows does...
Neither does ANY other OS. It's because Windows is the most used, that is the only reason.
You can also run Linux from a livecd/dvd and from a USB device for security purposes.
That helped me out a lot that I didn't need to swap a drive but this is not something a normal person (like 98% of the world) would or could ever do.
Ive had many people walk thru my system to see what its like compared to Windows and most are happily surprised how easy it is to use.
Wonderful, until they ask you how they can install "a windows program".
Once you get past the new app names and differences in terminology the learning curve is easy for most.
Until they need to do something more than browsing, mailing and typing. Any modern tablet can do that and most run on phone OS'es. Most households need more than that like video games and photo managing.
Look, Linux is great but it doesn't matter how much you love it or see the potential of it, it can't replace a Windows or MacOS X completely. Nobody hates you for that, just accept the fact.