I totally agree with you Adam, its the sudden surge of affordable external recorders that are starting to revive these older beasts!
I couldn't help it, but to upload a clip I shot with the Varicam 27h from atomos. See for yourself, the footage looks organic and has a certain filmic element to it.
raw file from Varicam into Samurai
https://vimeo.com/58041380
It does look good indeed. One of the nicest things about the old Varicam was the colors. It looked much better than the F900 IMO.
I think the organic look you like mainly comes from the softness of the 720p sensor.