Lens Blur in Lightroom (Patreon)

This video tutorial is by Adobe's Evangelist Julieanne Kost. She outlines a workflow for using this interesting new feature (another AI driven tool).

Although Julienne is using this feature to blur parts of an image that were captured in sharp focus, I would be more inclined to blur parts of an image that are already blurred, but not blurred quite enough to remove background distractions. In this manner I will be able to simulate an f/1.4 or f/1.8 bokeh from images captured with a lens that has a maximum aperture of  f/2.8 or f/4. The image below was captured with the super compact FE 50mm F2.5 G at F2.5. I can usually create more than enough figure/ground separation for head and shoulder portraits, when using this lens, but can struggle with full-length portraits.

Note > this feature is still being actively developed by Adobe's engineers (and computers) so expect this feature to improve over time. Sony could also help the accuracy of this feature by finding a way to embed depth maps into the EXIF of the files being captured. Adobe is already able to use the depth maps of smart phone images that can record these depth maps, e.g. the Portrait Mode of iPhones). This feature probably won't overly impress owners of GM lenses with f/1.2 and 1.4 maximum apertures but, in time, I would expect it will become harder and harder for the none-photographers to pick whether the blur was created in camera or in post-production editing.
This feature may also be a little concerning to manufacturers currently designing ultra-wide apertures if many photographers choose to purchase the cheaper, lighter and smaller lens and add the additional bokeh in post. 

Warning: Expect photographers to be divided on this topic and for some pretty heated forums out there on social media.