Microsoft a monopoly???? The only reason that you see PC vendors not offering any other OS to the consumer is because there is no other viable option for most costumers. Linux can be pretty powerful too, but it is far from being accessible for anyone. And that whole European Union stuff is crap in my opinion. They criticize Microsoft for bundling Media Player and IE with their OS, but why shouldn't they??? It just gives more functionality to the end user, and they're not preventing the customer in anyway for installing Firefox or any other software they want. Apple does exactly the same thing in OSX, hell they do the same with their computers, which they bundle with OSX, iTunes, Safari, etc. Should the European Union or the US courts do anything to them?? Of course not, because that's part of the user experience Apple and Microsoft are offering, and users are free to obtain other software options if they want besides the ones that already come with the OS.
For the record, I use Windows 7 on a daily basis, and I think it is a great improvement over Vista. Still needs some polishing, but I'm sure they'll have an amazing product by the time it hits RTM.