Look, it is simply a false premise that DB suits are outmoded. True, they are not widespread on Wall Street, but they are currently very fashionable and trendy. So, if you are generally getting looks outside the office, it is just as likely that people are noticing you for expressing the trend as they are for being odd.
Yep, DBs are definitely on the rise. They won't peak for a couple more years though; I see them more in designer shops (or in the fast-fashion shops that copy designers) rather than being truly widespread yet. It'll happen though, before the wheel turns again.