NJ5 on 28 June 2009
By income I suppose you mean revenue, since the game business doesn't always generate profits for MS and Sony.
In the last fiscal year:
MS: 13.4% (though this includes other stuff in the Entertainment division which is not all games)
Sony: 13.6%
Sources:
http://www.microsoft.com/msft/earnings/FY08/earn_rel_q4_08.mspx
http://www.sony.net/SonyInfo/IR/financial/fr/viewer/08q4/
My Mario Kart Wii friend code: 2707-1866-0957
