I'm kind of in a lucky demographic when it comes to sunglasses. I live in the midwest, drive a beat-up old truck, grew up in the countryside, watch NASCAR and baseball, and fish as a hobby. This affords me the luxury of being able to get away with wearing $20 sunglasses I bought at WalMart without anyone thinking twice about it. It just fits in with the rest of my exterior-facing personality. This is good, because with my relaxation hobbies, I tend to lose or break my cheap sunglasses a few times per year in situations where even Ray Bans would be lost or broken. With $20 shades, I don't need to worry.
We all choose what demographic we're going to fit in with, and with that comes tradeoffs. I have many expensive computers and the latest smartphone. This forces me to be frugal with the cost of my vehicle and the price tag on my jeans, allowing me to be "that redneck who turns into a nerd during the week" as well as "that nerd who turns into a redneck on the weekends".
I think more than the frugal generation, we're the generation who feels free to choose who we want to be and balance the tradeoffs we have to make. No longer does end goal have to be a house in the suburbs, two kids, and this year's nicest sedan, nor are our cliques set in stone. I can be both a nerd and a redneck, I can listen to both techno and country, and that's not weird. I don't have to own the nicest of everything in order to be a part of society.