[Hamuko]

>It’s almost certain to be a fairly cheap thing, at least for a GPU that can sling pixels at the gigabytes per second

Okay, but what about the battery connected to the GPU? The battery in my iPhone has already degraded below 80% health in the 2.7 years I've had it, so I'd rather not waste its charge on low-contrast glass effects.

[jitl]

You’ll be able to turn them off with “reduce transparency” setting like you’ve been able to since iOS 7