The GeForce GTS 450 is being aimed at the average gamer according to Nvidia. Nvidia sites the July 2010 Steam hardware survey to sell this idea:
According to Valve’s July 2010 Steam survey, 57% of gamers play between 1280x1024 and 1680x1050 resolution. GeForce GTS 450 is laser targeted at these gamers. It was designed to deliver the best gaming experience for the price ($129.99) on 19" to 22" 16x10 monitors.
Here are the specifications for the reference GeForce GTS 450:
Here is what the reference GTS 450 looks like: