So I got my hands on the S4 today, the rep came in with it.
I gotta say, seeing it in pictures does it NO justice at all. The design, while looking similar is much improved over the old one. It does look a little more premium than even I gave it credit for when I first saw it. The metal band around the edge doesn't look as cheap as i'd first though either.
The screen on it is fantastic, and I changed it to adobe RGB and did notice a very subtle difference. i couldn't check out all the new features sadly as the rep said it had some butchered version of 4.2.2 on it and a lot of the features don't work.
Either way, you definitely have to see it in person before making up your mind. I think i'm still going to go with the HTC One, but it made the decision MUCH harder.
This is exactly what I thought when I was reading and watching impressions. Only you are the best reviewer. I really want to get my hands on both the HTC One and the Galaxy S IV.