this is great news for intel owners - especially those with dual or quad core cpu's. Finally those spare cores might actually be used the way they should - for physics calculations, so there will be no need to by a physX card with costs double to price of a quad core processor anyway.
1. Intel buying Havoc doesn't magically make games support multiple cores; it will still fall upon the game developers to ensure the game supports multithreading. Additionally, games such as Supreme Commander already offload physics onto a second core, which to the best of my knowledge was not influenced by intel (not that Supreme Commander even uses Havoc).
2. I don't know where you price shop, but you've either found an amazing deal on a Core2 Quad or a horrible deal on a PhysX card. Newegg has 2 PhysX cards, one for $130 and one for $142. The cheapest quad core is $280.