It's not the first time for Tai Chi & robotics (Score 1)

Tai Chi's pushing hands (not sticking hands as this article says) has been used before [news.bbc.co.uk], and someone seems to think the Sony SDR-4X can already do it [www.tokyodv.com].

Even though the SDR-4X doesn't look like it's doing an awful lot (apart from walking and vaguely "holding the ball"), it's at least got better structure than half the people hawking videos ;-)