Overall a Linux based platform can certainly perform most of the tasks equally as well as a Windows based platform using the likes of Ubuntu and its derivative distros. However Linux does have its limitations with some applications and in particular gaming. For example I retain a partition with XP on to run specific applications which cannot be adapted through a Windows compatability layer such as Dreamweaver CS5, Office 2007 etc.
http://apcmag.com/how_to_dual_boot_windows_xp_and_linux_xp_installed_first.htm
Ubuntu is sponsored by the UK-based company Canonical Ltd., owned by South African entrepreneur Mark Shuttleworth. Canonical generates revenue by selling technical support and services tied to Ubuntu, while the OS itself is entirely free of charge. The main kick start Ubuntu had was the fortune Mark Shuttleworth injected in to the project
http://en.wikipedia.org/wiki/Ubuntu_%28operating_system%29
Mark Shuttleworth talking about Ubuntu Linux and the project goals
http://www.youtube.com/watch?v=mrLFFGWKqG8
Whilst we are here. It would only be right to move on to the sticky subject of Ubuntu and Debian. Ubuntu apart from using the same package management is about as far removed from Debian as it could be as Debian purists that spurn Ubuntu will go at great lengths to point out and in a way they do have a case. There was a time in the early days the two were although not the same were a lot closer to what they are now.
I currently work with Linux Mint 10 and am waiting with great anticipation for Linux Mint 11 as it will include Kernel 2.6.38 and Compiz 0.9.2.1 as default
So keep an eye out for Linux Mint 11 it should be released around mid-May. For the time being I thoroughly recommend Linux Mint 10 Main Edition which is built upon Ubuntu 10.10 Its easy to install and easy to use plus it comes with much of the software you are likely to need preinstalled
Linux Mint 10 Download
http://www.linuxmint.com/edition.php?id=67
The Perfect Desktop - Linux Mint 10 (Julia) Installation Guide
http://www.howtoforge.com/the-perfect-desktop-linux-mint-10-julia
Linux Mint 10 User Guide
http://linuxmint.com/rel_julia.php
You download the ISO. image of Linux Mint 10 then you need to create a Bootable LiveCD for installation
https://help.ubuntu.com/community/BurningIsoHowto
Linux Mint 10 can as most distros. be run direct from the LiveCD from Boot without touching your Hard Drive
Alternatively if you want to experiment a little Grab a budget pack of CD-R's and start creating some LiveCD's of various Linux distros.
Next stop is DISTROWATCH.COM where you will find a whole host of distros.that are available for download. The second link lists the most popular distros.
http://distrowatch.com/
http://distrowatch.com/dwres.php?resource=major
Wonderful things are LiveCD's and an ideal way of trying out a distro. without committing yourself
LUg.