That is revolutionary. The whole point with the redevelopment of the West Pier is that it would have a theatre and nice restaurants and things on it, unlikely the over-priced utter crap on the other one.
Every source I can find seems to suggest Blackpool has around 1.5 - 2 million visitors annually whereas Brighton has Around 8 - 10 million. This seems more realistic as I know from my in-laws that Blackpool is dead in the winter months, whereas Brighton is packed with visitors all year round.