Its time to admit it. PS3 will NEVER overtake 360.

[BBH]

 

Year/Months	PS3 Sales	360 Sales	SCE/Network OI	MS EDD OI	Additional Info
2005			$480,000,000	($391,000,000)
Nov & Dec	N/A	1,173,809			360 launches Worldwide
2006			$74,000,000	($1,339,000,000)
Jan & Feb	N/A	838,254
Mar & Apr	N/A	873,150
May & June	N/A	787,686
July & Aug	N/A	684,447
Sept & Oct	N/A	701,841
Nov & Dec	1,232,194	2,870,085			PS3 launches in NA and JPN
2007			($2,581,388,889)	($1,969,000,000)
Jan & Feb	690,361	1,031,092
Mar & Apr	1,237,249	654,381			PS3 launches in EMEAA
May & June	573,045	708,508
July & Aug	849,598	827,935			$50 price drop on all 360 models
Sept & Oct	1,036,032	1,636,538
Nov & Dec	3,235,606	3,019,891			PS3 drops to $399
2008			($1,383,622,222)	$426,000,000
Jan & Feb	1,559,046	1,170,829
Mar & Apr	1,358,734	1,151,993
May & June	1,236,458	938,078
July & Aug	1,118,247	1,046,272
Sept & Oct	1,202,100	1,607,562			$50-$80 price drops on all 360 models. Arcade is $199
Nov & Dec	3,244,880	5,093,919
2009			($649,733,333)	$169,000,000
Jan & Feb	1,268,611	1,474,252
Mar & Apr	1,239,598	1,223,416
May & June	895,998	945,205
July & Aug	1,393,845	1,013,884			Price drop on the Elite to $299
Sept & Oct	2,125,197	1,201,387			PS3 Slim launches. $100 cheaper
Nov & Dec	5,581,020	4,371,058
2010			($923,222,322)	N/A
Jan & Feb	1,844,374	1,441,955
Mar & Apr	1,689,812	1,179,612
May & Jun	1,060,237	977,010			Launch of 360s and clearance sale prices
July & Aug	N/A	N/A
Sept & Oct	N/A	N/A
Nov & Dec	N/A	N/A

I did this table ages ago when I was more interested in the sales. Just updated it. I think the numbers show that the PS3 will eventually catch the 360 - but not before new consoles are launched.

360 boosts don't last as long as PS3 ones.