Linus Torvalds moved to Open Source Development Labs, which has since merged with the Free Standards Group to become the Linux Foundation, Linus has been planning for Linux since 1991 after being frustrated with licensing of current operating systems.
In February 2013 steam was officially released on Linux as a beta. Steam has more Linux users than mac users already and steam on mac was released April 2012.
The most recent Linux mobile O.S is Ubuntu mobile for android smart phones and tablets. Ubuntu is planning on releasing a Ubuntu phone.
Ubuntu phone is available for android devices to download for free.
The raspberry pi is a budget computer (priced around £25 for type A and £36 for type B) running RISC OS (based of Debain linux). It's size is the same as a credit card.