I loved this article about the ongoing evolution of regalia at powwows
As much as I love the traditional materials, I understand that novelty is a crucial indicator of cultural survival. If people are only copying the past, then the culture is stagnant. Tribal spirit depends on each individual finding their own dreamvision. So if a person's regalia is exuberant and unique -- if they're incorporating current resources into their outfit -- then it's a healthy sign of a living, growing culture. Then when you see the traditional work, it's about the challenge of keeping the old ways alive, taking a consistent set of materials and learning what you can do with those. Innovation there looks a bit different. And then there's fusion, where you might see someone making motherboard lines in quillwork and beads.
Hints of this show up in my writing occasionally. The Iron Horses are a superpowered, intertribal, motorcycle gang over in Polychrome Heroics. Their uniforms are a cross between regalia and biker leathers. That was inspired by something I've seen a lot of tribal folks doing, where they'll take their cultural background and look for a way to merge it with whatever their contemporary interests are. It's not something that only exists in the past. Native culture is still here, and it interacts with the mainstream, sometimes in breathtaking ways.
And you can see it in my aesthetic tastes: my favorite dances include men's traditional, men's fancy dance, jingle dress, and hoop. A pretty even mix of classes that are straight historic and ones that have the most modern influence. *ponder* Though after having recently seen a white girl in a circus who did a brilliant hula routine with holographic hoops, I have to say I would really like to see what a native dancer could do with a set of blinged-up hoops. Because fusion is awesome. Traditional is awesome. Modern is awesome. Dance ALL the things!