Multiple STBs, one connection.
That's how a decoder works... unless it supports dual view.
And dual-view decoders, AFAIK, don't support every channel line up on BOTH televisions... like a certain batch is available for one TV, while another batch is available for another. I may be wrong (and I hope so) but the only way is to get another decoder/STB.
I think these guys will be cheaper than we think. They have to penetrate in the market!