* November 17, 2006 - PS3 is released in the US.
* July 24, 2007 - change the background to display any image is introduced in firmware 1.90.
* November 8, 2007 - user created static themes is introduced in firmware 2.00.
* September 1, 2009 - dynamic themes is introduced with firmware 3.00.
* April 9, 2011 - zembor0 from PSX-Scene releases the Dynamic Theme Editor.
If the PS4 scene progresses in the same way, users will be able to make static themes in 2015 and dynamic themes in 2019.
I personally think user generated dynamic themes on PS4 will come sooner than that