That's not really possible to predict based on current data. While Linux usage is increasing, it is not at a rate that directly affects Windows' market share.
Windows is better for desktop computers. Linux is better for servers.
Windows, MacOS, and Linux are the most common.
Mark R. Hinkle has written: 'Windows to Linux business desktop migration' -- subject(s): Linux, Microsoft Windows (Computer file), Operating systems (Computers)
Linux PreLoaded is a UK website that sells desktop computers. They have decent prices, plus the Linux computers have great ratings already in 2013. They ship from the UK.
Not only can Linux be run on desktop computers, but it can also be run on servers and other types of computers such as tablets and embedded computers. Linux is an open source operating system that is based on Unix, and Unix was first used for computer server applications.
A desktop uses the same OS as any other computer, Windows, Mac OS, or Linux. Also, I'd recommend Mac OS X if you're getting a new computer. Here's the scoop: if the computer has an  on it, it runs Mac OS. If not, it runs Windows or Linux.
No. Use samba to interface to the Windows network.
It depends on which off-shoot you wish to follow from the linux kernel - I favour Ubuntu 14.04 (Trusty Tahr) on at least two desktop computers, and Linux Mint 16 (Petra) on another desktop.
Don't use Windows use Linux Ubuntu
Nick Petreley has written: 'Linux desktop hacks' -- subject- s -: Linux, Operating systems - Computers -
Probably most you heard about: Ubuntu Linux Mint Fedora OpenSuSe Besides, Linux already is viable for usage on desktop computers, it just lacks games and some specific software.
Did you mean, "What are the NEW computers", or what are the NEWEST computers? If you did, Windows 7 & Windows Vista are the to newest versions of windows computers, unfortunately I don't know the newest versions of Mac and Linux. I hope I answered your question!