There are tons of gamers out there who crave faster-than-IPS response times and who want to play at high resolutions. The fairly affordable price is a bonus. For them this monitor is ideal. I doubt many of them care much about Thunderbolt since most of them probably aren't playing games on Macs.
But who cares about having a 1ms response time? It's so much lower then the FPS you'd playing at. How about having an IPS display with a 5ms response time so it's nice for everybody? I guess they're too focused on the race to the bottom.