I voted 2011, but not for snarky reasons. The current schedule for 2010 shows no new product past the Dark Sun books, except for "pull in new players" boxed sets and support. I wouldn't be surprised to see WotC continue to push in that direction; we may see all new material (what one might find in the PHB or MM series) released solely on DDI, while in-print books will be the starter material.
WotC may not call it 5E, but I suspect some people are taking a very hard look at the product lines and on distribution. After all, consumers in the 21st century (especially hobbyist gamers like us) are used to going online to obtain product. It's the 12-year-olds and the lapsed players who really need print products visible on shelves to spark impulse buys.
All heavily IMO, it goes without saying.