Will LaiR and Ninja Gaiden Sigma Boost sales of the Ps3 for this Summer?

[DKII]

Everyone was saying the same thing about Motorstorm, Virtua Fighter 5, and Oblivion in March, and PS3 weekly sales actually went down. I don't see many of these games moving many systems without a $200 price drop until MGS4 or FF13 or the like hits.