After seeing these panoramic screenshots, it'll be hard to get excited about regular screenshots again. Panogames have QTVR screenshots for Half-Life 2, Battlefield 2, Quake 4, Call of Duty 2, GT Legends, and a racing game called FIA GTR. Instead of describing them, it's best to just see them for yourself.

While it's not listed on their Half-Life 2 page, the piece de resistance is a shot of striders inserted into a street scene in Köln, Germany. It's like freezing the breakneck pace of Half-Life 2 and being able to stop and look around. Make sure to look up.