Every generation needs to "rebel" against their parents somehow. But what do you do when your parents rebelled against THEIR parents so hard that they still pride themselves on noncomformity and anti-commercialism? Naturally, the pendulum swings back, and the answer is in acting willfully inauthentic, cliqueish, superficial, materialistic and generally yuppie-esque. It sounds like something out of some mediocre dystopian satire, but there you go: the terrible roots of the "hipster"/twee/tumblr ethos.
So, adding to the flavor-of-the-week garbage heap of Crystal Castles and Lil B, we have Grimes, who repackages what Boards of Canada already did better a decade ago ("hazy" nostalgic recontextualization of muzak) with added "detached" blank facial expressions, memes and ironic metal poses. Basically brain poison. When I'm old I hope generation Z realizes this stuff (not grimes in particular, who will be completely forgotten in 5 years) is soulless pap and discovers guitars again.