I think it would be amazing if Adobe incorporated some of these projects (Neural Style, etc.) as part of their "Creative Cloud" offerings...actually compute it in the cloud and return the result back to Photoshop.
But a consumer-grade plugin with an online renderer might be feasible for now.
* Fast solutions include a pre-training step that can take days. Would be weird to ask the user to do this
Alternatives to training include downloading the trained model. It could be a big download but an overnight download is not that weird to ask users to do.