Half my work now is out of my home now, I don't need a SAN, instead clients ship me a thunderbolt raid (typically a G-Raid) that I ship back once the project is finished. And I know more and more editors and motion graphic artists who are doing the same, less work in edit suites, more work at home. Fast, portable drives makes that possible (and efficient high quality codecs like ProRes and h264).
I've been doing this for 20 years, we'll still need fast, portable storage for many years to come and right now, for video editing, Thunderbolt is the best choice.
So, for the kind of use case where you need to move lots of data, very quickly, eSATA may not be better :)
Edit: The g-raid mentioned looks like a 2x spinning array, so well within the limits of a single sata III bus.
Also, aside from the G-Raid, we also use 1 and 2tb SSD's (more for portability than the extra speed).