Sounds suspiciously like the unwanted offspring of cloud computing and phone contracts.
I can't see HP supplying me with a machine that can run DOOM in the evening but which clocks down to run Office during the day. But maybe that is exactly what they're thinking.
That game you were playing? Bits of it ramped up to the full specs of your machine. Your bill is therefore £30 more this month than last month. Last month you only used 20% of your allowance but we're still going to charge you the full months worth. Why not upgrade your package to have more compute cycles and get a free cinema ticket?