Bill Slavicsek is "the man" over at WotC as far as D&D goes. If he is saying that essentials is the direction that they are going in the future, it is a good bet that is the case.
Anything more than about a year out is wishful thinking and flies in the face of established WotC practices. Remember when 3e was going to be the cash cow as other companies put the time and effort into 3rd party products and WotC JUST came out with the core books? Yeah... THAT plan lasted.
WotC is part of a BIG company now... for better or worse. They will not be nimble and they will not be terribly innovative. We can only hope for the best.