Hmm, that looks very nice. I don't filter my beers, but have on and off used finings. I have found that I have had really clear beers with and without finings, it's hard to pin down how much influence they have.
There was nothing special about this brew. I used Wyeast 2001 and fermented at about 11C. The glass in the picture was poured from a 500ml bottle. I find that most of my beers are pretty clear as well but this one looks like it was filtered.