Depends what you mean by Leather Jacket shop? If you mean a shop that sells ONLY leather jackets (like Matchless or Belstaff - but even those extra things) then there haven't really ever been many leather jacket shops anyway, that would be quite a niche. You've got Schott In NYC and places like Wilsons that spring to mind. I'm totally spoilt working in London of course, I'd only need to go to Selfridges to have a pretty big selection of decent brands of jackets - and 100 other things also.
But as my right honourable friend says, the Internet stores can pretty much let you try on a jacket these days with free to and return postage options. I think stores in general will continue to be on a gradual decline with the coming of the Internet.
(I could have posted this post in 2000 and it would be exactly the same story!)
Belstaff Hero, Police, Marten, Brad, Ethan, M, Legend, Indy, Button, Panther, Seven, Denim, Patterson, Roadmaster, City, Lawrence, Duke of York, Cople, Sammy, Sandway Matchless Osborne, Roadfarer, Baker, Fulham, Craig TNO Surrogates, Indy IV Kelso Relic BR DH4 Royale Quantum RRL Owens, Farley, Moorhouse Lot78 199 RL Bradford, Harrington, Sutter, Barracuda, Biker Baracuta G9