Hum look at that :http://youtube.com/watch?v=Jhr-fbMW4Sc
It doesn’t really seem to qualify as “natural walking”. Ok neither does the Virtusphere, and I can’t comment on the ODT since I’ve never tried it but as they want to study natural walking, it better be.
But this does look a lot less impressive and as a result you look even more silly. With expensive systems you at least have the Wow effect before realizing you look silly =)
Why do I mention how this makes you look like? Because I’m pretty sure that this has a huge impact on the acceptance factor of such devices for mass market.
Anyway I’d have to test it to get a better feeling..