I'll second this
At the end of the day many of us have applications that just wont work on any linux distro. We are also not willing to compromise on their performance or stability by using wine and so have no option but to have at least a duel boot or stick with windows entirely. I personally run Ubuntu on my netbook as I use it only for viewing pictures, movies on the go, web browsing and a little bit of writting. It is perfect for me, my home PC has to have windows for many reasons.
Having the choice is nice though. I'm sure we can all remember times when it was literally windows or nothing now we have 3 or 4 stable and polished operating systems which are capable of dealing with our different needs (Windows on my netbook? You must be mad, I value FPS when writting)
The point about this latest Ubuntu release is that most people probably use only 5 or 6 applications in their entire computing lives. Word, excel, outlook, IE. This is changing slowely but it is true, now more than ever, that Ubuntu is capable of delivering to the majority of users. I would happily role this out to friends and family now and really expect to see it more frequently in office environments.
I'm no linux fanboi. I like various iterations of the OS but think generally speaking it is not significantly better or worse than any other modern OS. What I am a big fan of is competition. Windows 7 is a direct result of emerging competition. MS realised it could not carry on being lazy so stepped up its game and brought out an OS of which there seem to be no diehard critics. Further competition just means further benefits for us. I hope this game gets alot more interesting over the next few years because a revolution in UIs has to be coming to the desktop soon.