Golem is a broken model out of the gate. I don't think businesses are going to be cool with having to buy GNT from some speculator at arbitrary prices, then spend arbitrary amounts of it (that can and will change from task to task) to get their work done -- and then, if they want to get more work done, buy that GNT back from the speculator again and pay him another arbitrary amount. It's a recipe for disaster when you get have to use company scrip and are forced to shop at the company store.

Gridcoin is the only actual blockchain-based project for distributed computing in production and paying people now for both CPU and GPU-based work on a variety of projects. Beyond the broken model, Golem is CPU-only, rendering-only until Clay at least, and god knows when that will be out.