I used live in queens street back in 2001 with my mates for a few years and parking was a nightmare at the best of times, then gunwharf got built and it got worse as so many peeps object to stupidly high underground car park charges, I live in fratton anyway abd traffic is nightmare, I dont use my car when theres a game as its pointless - get the bike out!
I think it would be a bad move personally and agree with what tim said about the harbour not being the same, my grandad worked years ago in the old dockyard putting massive rivets in to ships,HMS Vernon I think was called - I personally wouldnt like to see that area change any more than what it already has - but hey thats only my opinion -