If I was a West Ham fan I'd be delighted with this.
Not only because my club would have a shiny new stadium, but also because it probably marks the beginning of the end of the Gold/Sullivan/ Brady axis of evil. I'm sure I read at the time of their numerous attempts to get a free 60k casino/pleasuredome at Small Heath that their business plan was basically to do what the owners at Man City did in 2002, get a free stadium to increase the profitability of their asset and move it on.
They were never going to succeed at a two bob outfit like Small Heath, but you have to have some degree of respect for their persistence.
Only fly in the ointment I can see is that one of the few things the 'ammers have going for them is the atmosphere they can create at a tight ground like the Boleyn. Take that away, or space it out in a vast stadium and they might be even less effective as a team, if that's at all possible.
Having a nice shiny Olympic stadium hasn't done much to improve the profile of Hertha Berlin, for example.