Ok i have used Windows for around 4 years or more and have tryed Linux befor but only for like 5 mins at a time at a frineds and so on anyway as for people who try it then remove it i think they are making a mistake as Linux *well the distro i use MDK 9.1* seems to be a user friendly Linux once you have learnt a few basic commands i see the rest starts falling into place.
The only thing i can see is the problem is the same problem i think most people would see and that is the support from companys ie: Software and Games but if you look around or ask you normany find what you looking for and with Games well if its a good game then at some point it stands a good chance at being released for the OS.
Basicly for the sake of a 5GB or 10GB Partition *and most new PC's now come with 100GB + drives* you cant go wrong with installing it and learning it at your own pace.
My View of Linux = Good OS
Will it ever beat Windows?: Posibly
Will i switch to Linux and remove Windows?: If when i have learnt the OS more and i see no reason for windows yes
Overall view: 100+ distros = surely you can find the system that suits you and if you dont you can allways edit it