tracks can achieve the same thing more efficienly and faster... Though this is a cool looking design I dont think it serves its puspose quite as good as it should...
Actually, tracks are the least efficient of any design
Rhex is more efficient than the Loper, but the legs have to do a lot of stop/start motions and has structural tuning problems (it badly bounces on hard surfaces).
I've seen quite a lot of Loper type robot wheels - remember whegs?