Untrue - Windows isn't the best OS just because of the fact that it's pre-packaged, it's the best OS because it became the industry standard, breeding a large legacy of software and hardware designed with it in mind. It's not just adopted by the customers, it's adopted by the industry at large and it's a fool-proof solution for the end-user. The biggest downfall of Linux is the fact that there isn't one Linux you could standardize for - it's just hundreds upon hundreds of disjointed distros connected with each other only by one of the several base kernels, and that's not a favourable environment for a consumer that just wants his shit to work. I know you love the tux more than life, but the fact of the matter is that Windows users just use their computers to work wheras Linux users work on getting to use their computers, 10 out of 10 times. Linux is a great solution for industrial applications and hobbyist use, but it's not a consumer-grade OS, despite the numerous attempts at making it one in the past. If Windows has a consumer-grade competitor then it's Mac OS, not Linux of any variety - that should satisfy you since it's UNIX-based anyways. It sucks, but it's a competitor.
Anywho, this is a thread about Chromebook covers, so I'll stop my rambling here - I just wanted to say that Chromebooks are cancer based on principles in computing that I despise and it worries me that Windows too is becoming infected with the horrors of the Cloud. The "Cloud" is a useful tool, but it should never be considered primary storage unless it's "your own Cloud" - a server you set up yourself that relies exclusively on your own expertise and care.