Imagine you have a big computation problem.
You build your app the way it would run on supercomputer.
That unit of computation you sign with your key.
Then you submit it to p2p network.
It is written in blockchain framework that has simple interface calculate verify.
Blockchain network uses interface/strategy pattern to calculate the problem and do verification.
Blockchain does it’s thing you get the result.
Blockchain is used for distributed consesus on some other service like anonimous bitcoin or instant messaging or distributed search or distributed thing that is not distributed but centralized now.
p2p network might run these algos in kubernetes way.
example distributed mail is backed by (pifs|protein fold| neural network training| large prime selection) blockchain algo combo
imagine blockchain for rent where you get compensated for computation?