I've had this discussion before on other forums. I think it's very premature to say that the RTS genre is dying.
Most people are well aware of the "migration" towards consoles, but the RTS genre has been the glaring exception. I personally think that the kind of gamer who likes RTS is just a different beast from the kinds of gamers that are on the consoles. I think the console-gamer is epitomized by the Yahtzee Croshaw of Zero Punctuation fame; buy new games at frequent intervals, play them to their end, then take them back to the store for a trade-in. The RTS gamer is more likely to play a game for months on end, if not for years. We get involved in community projects, like modding and map-making, things that aren't feasible on many console titles and require direct developer support.
With that in mind, I don't think the RTS genre is dying so much as consolidating. There are fewer titles, but the titles I see are more promising. I thought that Supreme Commander was the only good RTS of 2007, and Sins of a Solar Empire was the only good RTS of 2008. You only need one good RTS in 2009 and 2010 for me to say the genre is holding firm. On the other hand, with less competition, lesser-known titles have more opportunity to get out there and succeed. I think that if good developers take the initiative and release some top-notch games, this could be a golden age for RTS. If Sins of a Solar Empire and Supreme Commander are indicative of the genre's decline, then frankly it's the best thing that ever happened to it!
Right now, I'm closely following Starcraft 2, Achron, and Dawn of Fantasy.
I wish they'd make a good sequel to Empire Earth
EE is dead, sorry to say. EE3 was such an utter failure that the brand has lost its credibility. There are hardcore fans who will always yearn for a sequel, but no one is actually going to sink money into a franchise tainted by such a horrendous flop.