Don't assume, ask. I did watch the video. Sometimes light reflects properly and illuminates the scene, giving it realism, sometimes it does not. The example AtenRa gave is exemplary for the latter situation.
I didn't say it looks good, read my post again: I said it looks borderline more realistic, or to put in in more tangible terms for you, both screenshots are equally bad. One lacks the effects of indirect lighting, the other one exaggerates the effect with such zealousness that it ends up crushing the entire scene into dark areas and over illuminated, candy-like surfaces: details in the dark areas are gone, shadows in the intermediate areas are erased. As I said in my previous post, this RTX demo is a Radio Mix, compressed beyond any value just to prove a point - that RT is so much different.
And just to repeat myself in case anyone else missed it, my comment is directed towards the demo only, I'm pretty optimistic about RT itself bringing benefits in real time rendering.