eh, it's just an idle threat. Despite being released a year after the 360, the PS3 is about 7 mill units behind (23 mill to 360's 30 mill) which really isn't much, especially considering the price. Plus Activision's games sell really well on PS3, so if they do drop PS3 support I think it would hurt them more than Sony.
And there's hardly any doubt the PS3 will see a price drop soon, the only thing people are wondering is if the rumours of a PS3 slim are true or not.
~ PSN - Trent_Steele ~ Steam
~ Battle.net - Chief#6843