The ones I've been looking at (leaning toward the M51 Engineer bag), and the ones I've seen people wearing don't look much like purses to me.
I bet they're only going to become more acceptable over time. People carry a lot of stuff around these days. Seems ridiculous trying to stuff more and more into your pockets.
I guess it's a matter of function vs. fashion. I'll take function. I have too much stuff for pockets. Even if I narrow it down to just the necessities, I have phone, wallet, keys, PV, extra battery, juice, sunglasses... too much for my pockets. I'm not going to worry too much about whether or not my bag makes a manly enough fashion statement. And the people who do worry about that kind of thing aren't the type that I care much about the opinion of anyway.