Have we found any good uses for Thunderbolt yet?

It's been quite a while since Apple has introduced Thunderbolt into their laptops. I own a MacBook Air 2011 with the Thunderbolt port and I have a few friends with MacBook Pros with the port as well. I don't think any of us have found a use for the technology yet.

Have you found any good uses for Thunderbolt? There are a few Thunderbolt accessories but they are extremely expensive compared to their USB counterparts. Besides using the port to convert to Ethernet or whatever, what are you using the port for?