I know that you share the same view as a lot of others here, and I understand your point. Obviously for those of us (which is a great deal at this point) who own 2K or 4K monitors, this far from ideal. With that said, "because it's god damn raytracing".
I stand by what I said after the conference, gamescon was utterly the wrong setting to expose this technology. Threads the world over, including this one, have proven that. This is a huge deal, and I can understand why NVIDIA want to share it with everyone. It's simply that they chose to make it the entire focal point of the conference, and that was a bad move. Right now, it's the technology at a very coarse level. We are years, maybe even decades away from being able to render in real-time with the same level of fidelity, or samples per pixels that is possible in non-realtime. That really shouldn't take away how awesome this is, though. It's just certainly not for everyone just yet, least not gamers.