This boils down to 2 things, technology and attitude.
Flaunting the amazing innovative technology something was made with is always cool. People make things in certain ways - simply because they can! When digital printing became possible, so did photoreal floral designs that really show off that full range of color and incredible detail. When laser-cutting fabric became possible, mesh workout shirts with geometric designs cut out became all the rage. And the made-to-order industry opened up so many doors, you can order custom sneakers to be made in your fave colors, with your name embroidered on them. Or you can upload a photo you took on your phone and turn it into coffee mugs, no problem.
Sustainability is also a huge frontier where companies are exploring super-inventive materials and fibers for making clothing and gear.
Attitude is the other area where people are pushing the limits - not of what's possible, but of what's acceptable. To be really weird and challenge the status quo. Like hey I'm gonna wear this color because it's a really gross color except now it's cool, and I'm going to wear this post office uniform with pink fur slippers, and a string of pearls - because, fashion. It's embracing the high-brow / low-brow combo, and being so unapologetic that it's pure defiance.