You're misrepresenting the trend, while PS3 has caught up with the 360 in the sale of some games, it has in no was surpassed the xbox 360 in all areas.
Examples Include (using the same site as you, vgcharts.com):
x360 sales: 10.69m
x360 sales: 2.05m
x360 sales: 0.75m
Major League Baseball 2K10
Just Cause 2
As you can see, PS3 is in no way "destroying" the xbox 360 in terms of game sales.