Golem (www.golem.network) is building a general-purpose distributed computation platform where people who need compute power pay using cryptocurrency. And developers can build software to run on it (and get paid when it's used).
This might work well with Golem (www.golem.network) because they've implemented WASM which opens up many possibilities. I haven't found a cheaper way to render.
Yes, this is the idea. Enclave technology should improve over time, whether it's SGX or something else. And Golem is working with Intel, Texas A&M and others in creating an environment called Graphene (https://grapheneproject.io/) where applications can easily be run on SGX.