I actually bought the GS4 for 2 days. Then I returned it. I couldn't stand it. It was horribly laggy compared to iOS, and a lot of the apps I use were either non existent on Android or were far inferior than their respective iOS implementations. It's a shame, I really looked the size and shape of the phone. But colors on the AMOLED display are WAY off, and no amount of color calibration worked, it was always incorrect, and I need accurate color reproduction even on a mobile device for photography.
Also, the sheer amount of useless bloatware was stunning. They use super fast processors on the galaxy S phones but then they bog them back down with all of the completely unnecessary buggy junk. The amount of lagginess on the galaxy phones with touch wiz is simply unacceptable on a supposedly premium device.
There are many reasons to love the galaxy s phones, but don't pretend that Samsung is doing any serious innovation. They use outright lies in order to boost their numbers in processor benchmarks - that is an indisputable fact. I don't like them as a company, as a corporation they don't show much responsibility.
PS - I am in Vegas as well.