Photoshop Style Transfer Neural Filter

I had been wondering how you could transfer a certain style from one image to another - for example applying a sketch style to an image by transfer from another sketch style image.  In Firefly you can do it but, as far as I know,  only to a Firefly generated image that you have created using text - using one of the Firefly styles or uploading your own image that you want the Firefly created one to match.  I had played around a bit with Photoshop neural filters but hadn't realised you can upload your own image and use it as a style to apply to other images.  The process is described quite well in this video from Dave Kelly:

PHOTOSHOP Painterly Tutorial (Style Transfer Neural Filter)

I can think of all kinds of possibilities for applying this technique and I'm looking forward to try it out to see for myself just how well it works.  

Tony