Wireless auto gear-changing bike with smartphone app

[Aushiker]

[youtube]http://www.youtube.com/watch?v=DJH3nBo2xCs&[/youtube]

Backstory at Road.cc

Andrew

[Xplora]

I'm in two minds... great for training (in fact, with a HRM and powermeter, AWESOME) but if you're not riding solo, I'm in two minds. I did a quiet today with a mate who hasn't ridden in years, and another who was out of condition... I couldn't use this system because I normally ride 5-10kmh faster than I did. What about big accelerations? Maybe I'm being a technophobe, I'm very pro-Di2/EPS but I wonder if we've got to move away from derailleurs if we want this "auto" gears stuff.