We have Heimerdinger, Viktor, and Hextech skins, as well as Gunblade and Revolver, which all look very "Old-school Techno" and Colorfully Steampunk.
But now, lately, we have Vi's "Hextech Gauntlets." The thing is, these things are technological behemoths. For lack of a better word, they're SHINY.
It looks more similar to Jayce and Ezreal than it does most Hextech. But we're calling them hextech.
The easy answer is that with Pulsefire Ezreal and Jayce and whatnot, Hextech has advanced, but as far as I know that's never been confirmed. So what's going on?