Drupal 8. Imce module show thumbnails instead of a filename
Short answer: No

Long answer: This seems like it existed in the 6.x branch of the module as a "Box View", but in 7.x it looks like it's been dropped. See here for the 6.x discussion. And there's a ticket for 7.x too, with 0 activity.

Edit: Serhiy found out that for D7 there's a template file which can be modified to display thumbnails instead of a list.