EA, in their infinite ability to disappoint on a yearly basis, has realized, "hey, no one is buying our games". The problem is they seem to think it's because there aren't enough NASCAR fans when in reality it's because they have been making shitty games since NASCAR 2006.
What I heard is they are aiming for a more casual audience while they re-evaluate the sim-like approach. I don't think we;ll be seeing another NASCAR game on the PS3/360 until at least 2011...but who knows what E3 has in store?