EMI come up with plausible revenue stream

It's not exactly a novel idea, and the question is 'what took you so long', but EMI are launching a special division to deal with instant live albums:

Abbey Road Live, EMI's new live music audio and video recording and instant production service, will allow fans to purchase high quality live recordings of shows they've just attended. Mixed and mastered on site, the recordings will be made available in a range of formats including CD, DVD and USB or via secure digital delivery to home computers or mobile as streams or downloads.

The secure digital delivery is probably the sweet spot - waiting for you at home before you've got your boots off.