Credit where due/satellite mobile TV to flop?

Has the BBC bought a new map? In the last few days there have been some informed references to the Korean peninsula.

On Friday, they highlighted Korea ("where broadband is commonplace") in this non-regional story about downloading films. And today there's this balanced article about mobile TV, with the line:

Korea and Japan are way ahead of the game and have been testing several methods of reception for a couple of years.

I'm quite curious about SK Telecom's upcoming satellite DMB service. The satellite signals obviously won't reach underground trains, or indoors, or as far as I know even inside a vehicle. Sure, it'll be fine when you're walking down the street, but am I not right in thinking that you can't watch TV while walking down the street? On the face of it, it sounds like the only place you could use it would be while waiting for a bus. Anyone who's been in Korea for ten minutes knows that people want to use their mobiles on the move, particularly while underground.

I asked a Korean research manager about this over the weekend and he said that a lot of "gap fillers" would be needed -- I assume that's what I'd call a leaky feeder or a repeater. He admitted though, that he wasn't actually aware of such a thing working in practice at satellite transmission frequencies. Does anyone know if this has been tried?

Unless I'm mistaken about the basics here, which is quite possible, then I predict that S-DMB is going to be a flop in Korea's consumer-led technology market. T-DMB, on the other hand, works indoors and the technology to repeat the signal underground is tried and tested. I know which one this consumer is going to buy.