Yeah I'm sure they're working on something like 30nm cores or something.. No telling with those guys. I know they start devolpment of a CPU like years before it hits the market, so they already have something else going beyond the I7 I'm sure.
*Off topic*
tigerdirect is gonna have a i7 CPU for like $120, and a Asus X58 board for like $139 tomorrow on their webcast. Then all you have to do is buy the $150 RAM. Pink Friday (Official Site)