opinion....
Will Linux will ever be a popular and significant desktop product?
I really don't think it will. I don't care if I get flamed for the opinion, but from my experience people in general: download a program double click it and it goes, click ok a couple time and they have their wonderfull new software... With another toolbar. I don't think people (in general) would understand that you need an emulator to run a .exe... and what happens if it doesnt work? God forbid... Would they know how to search for an equal piece of software? And when they find it are they going to know the difference between a .src, .tar, .RPM package? Plus, what happens when their kid goes in and plays with the resolution, and now they are stuck at a CLI prompt? Would they be able to get the GUI back? And lets not talk about the differences between init 0 - init 6, also ctrl+alt+1 - ctrl+alt+7 and why they are important. There are so many other reasons why I dont think the general population would convert to Linux... On top of, have they ever heard of it?
Would I support it?
Depends on what Distro they were running. I would say it would be "best efforts" support, and my per hour rate would go up.
