True, but the theory behind MIMO and DIDO (i.e. pCell) is the same. The challenge is overcoming the synchronization and timing problems introduced by having antennas situated miles apart and connected over the Internet, rather than a few centimeters apart on the same circuit board. People had similar concerns about cloud gaming, but OnLive (which, note, also came from Rearden Labs) and Gaikai proved it could be done surprisingly well. Now that I think about it, Rearden may already have gathered some highly relevant expertise from their experience with OnLive.

Also, Rearden has been claiming for some time now that they have working demos. I doubt they're making that up. I fear, however, that Artemis may meet a similar fate as OnLive: a technological marvel that unfortunately fails in the market.