While the economies of scale often offer a discount, there are some possibilities here, power cost increases when demand at a single location increases beyond a certain factor, inherent network capabilities suit a decentralized service, network services can route around censorship and handling heat and safety cost are not linear when resources are centralized.

So perhaps switch the laptop for a wall based crypto-heater packed with silicon (see here for the heat output of a gaming pc vs a space heater https://www.pugetsystems.com/labs/articles/Gaming-PC-vs-Spac...) and there may be some potential there, maybe Elon can throw a battery in there too...

It's certainly fascinating that for all the talk about blockchains and ICO's I've read very little about the fact that the internet has been augmented by a distributed cryptographic system available for rent, altcoins that rely more on CPU and memory and therefore discourage GPU and ASIC use might mean the network moves to more general computing power for rent, interesting times as they say.