Kaleidoscope Hair: As was mentioned back under You Gotta Have Blue Hair, there is a certain shampoo which is specifically designed, via hair-clinging nanites, to let your turn your hair into an active LCD display surface. (For a week or two until it starts wearing off, although you may get a few dead pixels before then.) Or, for those with more permanent ideas, the implanted-nanogene version of the above that you don’t need to renew. These allow you to have very impressive Kaleidoscope Hair indeed – heck, you can even run fractal screensavers or actual video clips on it if you like.
And if you’re just looking for a reliable way to create this effect, regardless of what wind or in-flight airstream or other sources of disarrangement might do…
(I would thank Hasbro for letting me borrow Rainbow Dash to illustrate my point, but honestly, I’m just counting on them not caring that much.)
…then you can have it.
You Gotta Have Blue Hair: Not all the uses of genetic engineering – or other technologies, including that shampoo that turns regular hair into a fully-functional LCD display surface for a week or two – are for even vaguely utilitarian purposes. Enough said.
(As a side note, the silvertouched – see Our Dwarves Are All The Same – do this naturally with some metallic colors, due to their symbiotic silverlife accumulating metal within their bodies, which turns into metallic strands in among their hair, among other things.)
We Will Not Have Pockets in the Future: As mentioned in Waistcoat of Style, both sexes wear waistcoats simply to provide adequate pocket space for their collection of little gadgets for this and that and the other thing. So, averted to the point that there’s actually a specific garment to provide the future-pockets.
Today’s accidentally found art comes via Geek & Sundry’s article: “The Future of Cosplay, Today! Felicia Day Models 3D Printed Armor” (more images and photoshoot video at the link), in which the armor in question was designed by Melissa Ng (link to her work here, and seriously, check it out; it’s well worth it).
Which I post here, apart from the desire to share really awesome stuff, because upon seeing it, well, I could not help but conclude that it’s a work of art precisely in the Eldraeverse idiom.
(Not as armor, technically speaking, there being certain annoying physics-based necessities inherent in protecting one from flechettes travelling at a respectable fraction of c; but for the lady sentinel attending the Court of Courts or another similar formal occasion, it would be perfect.)
And so if those of you with an artistic headcanon could update it accordingly, that’d be shiny. I’ll be over here updating the non-head canon.
Waistcoat Of Style: Played straight, for both sexes (cut appropriately differently). The Empire is a “thingist” culture that particularly enjoys its little pocket gadgets for this and that and the other thing, so obviously, you need a garment specially adapted for keeping them in, starting with your fob… terminal.
(And you generally can’t use your trouser pockets, because your weapon belt – and attached sidearm and blade(s) – gets in the way.)
Unlimited Wardrobe: Played mostly straight – the flexibility is not unlimited, after all – by smart clothing, which can offer a variety of style modifications (via inbuilt MEMS), color changes, and other self-reshaping properties on the fly. (And, of course, at home there are cornucopia machines.) Played entirely straight by virtual clothing (which consists of an AR projection over a neutral gray jumpsuit or spraysuit, so long as onlookers are subscribing to the public v-tag channel and your coding budget is adequate.
Sticks to the Back: Both possible, and done, with tiny vector-control emitters sewn into the clothing that can grasp objects you place on top of them and hold them in place against the emitters, or even at a designated range from them. And, obviously, anywhere, not just the back, including – if you care to be quite gratuitous about it – orbiting around you. (It should be noted that these are generally double-ended – the emitter grips you at one end and the object at the other, such that it doesn’t strangle you with your own shirt.)
Of course, it’s still usually considered unnecessarily showy much of the time, and they do introduce a dependency on your clothing’s power supply continuing to work, something that holsters, pouches and pockets by and large do not.