London doesn't seem to have a problem North Greenwich station always showing up as North Greenwich for the O2 on all the maps and documents - can't say I've taken the tube that far east though ... not sure what they've put in the station.
At least in that case it's O2 Arena. It might just be a case of making it easier for people to find their destination (maybe people were heading to the wrong station?). It's not like it's a blatant sellout/cash grab, and also it's a new station (1999) which doesn't have the heritage importance of Covent Garden or Bank Station (that's not to say age should play a role. I think all names should be hands off).