People in the UK travel much more by train than we in the US. Still, I think office centers at train stations would be great here:
Sitting in a proper office space after missing your train would certainly beat propping a laptop on your knees outside WH Smith as the pigeons wander round your feet. Regus has initiated a similar programme in France, where it is opening drop-in business centres in six stations, and it has plans for more developments in the Netherlands.
It sounds like a reasonable deal for business travellers—depending on the price charged for access.
Sadly, we in the US don't use rail services nearly enough to make this profitable. I can't imagine Metra spending any money on these services here in Chicago, for example, and even if they did, where would they put the office centers?