Exactly
I'll be happy when I get service while I'm stuck in the middle of the tunnels between stations. As you said, on the platform alone is a miniscule improvement and definitely not worth paying for.
I hope it's simply a matter of putting repeaters inside the tubes to achieve always-on connectivity. I don't see why that would be a problem (other than cost, of course). I'd definitely buy into that. With an hour commute in each direction, I'd love to be able to keep my data flowing. (Plus, I could let my boss know when I'm sitting in a tube not moving just three stops away from work!)
The only condition I'd want to impose is to never allow voice! I can't even begin to imagine how miserable the commute would be if everyone was having a phone conversation simultaneously. (With Skype being a partner though, this might actually happen.)
