I think because I'm an internet addict, I'm quite welcoming of any enforced stretch of time where I know I can't get access. I even try and position myself in certain parts of the tube on my journey to and from work so I can pick up reception when we stop in the stations.
However, that's all free connections. I don't know if I'd pay for it if it became available. I'm usually content with airlines movie offerings on the longhaul flights to Australia and the USofA.