Interesting comparison between a screenshot of the Workbench running at 1920 x 1080 in FS-UAE against a Macbook Pro running at 3840 x 2160 on an LG 4K monitor. AmigaAMP and re:AMP for Mac side-by-side for comparison. This gives you an idea of what the Bench, even with a large Icon set like Mason's would look if rendered on a 3840 x 2160 (4K) display. Actually, you can run the Amiga at 3840 x 2160 via Picasso96 in FS-UAE, but only in 8-bit color mode instead of 32-bit, so don't bother.
Besides, the Amiga OS3 WB looks awesome in 1920 x 1080.