Ah, no. Quite the opposite really. I prefer to rely on my own hardware and software for most things. The internet is wonderful for information and communication (just look at HTG) but I see no reason for it to also supply our software. Native applications are more reliable and more responcive (in my experience).
The big reason you will find many more native application users amoung Linux is because we are all about software Freedom. With software on your computer you decide exactly where all the files go, and what sees your data. Moreover, the vast majority of linux software is free and open souce, so one can contribute to it and modify it to suit their own needs.
Ah well, windows, ChromeOS, and the others can take their own path. Linux is sticking around for me and lots of other developers like me.
Yes, no problem at all. I have Linux installed next to windows on my tower PC. They both work fine -- though I havn't had any need to boot into windows in years. If you try Ubuntu (a very easy linux distro to use. It is much like a Mac.) it will automatically give you the option as it installs to exist alongside of windows. You just choose which OS you want to use every time you boot up.