If I'm not mistaken, Alexa shoots 1080P to an internal codec, but the majority of the Hollywood pictures released in theaters are shot using the 3.5K raw workflow and processed down to 1080p. 3.5 K RAW with the amazing dynamic range on the Alexa is far superior to anything I've seen yet from any camera, RED included, but to keep it real, we haven't really seen anything from EPIC yet. It looks like Contagion was still Red One, so lets Not get disappointed quite yet. I'm not bashing RED here, as I will put my money into RED but mainly because of the concept of a smaller body camera with a lot of power and one most important key factor, Price!! Regardless of the hype, Resolution isn't everything, and resolution, and more importantly image quality, comes from a lot of factors, and not just a K rating.
RED ONE is 4K, and I've seen several theater films shot on RED ONE and was far from impressed, regardless of the resolution. The Alexa has completely impressed me with the quality and I have to say the resolution didn't look any worse or at least noticeably worse to the eye. Do we really need more resolution or is the key Dynamic range, natural skin tones, color, organic feel, etc? This is the 50,000 dollar question. Take a look at drive, mr poppers penguins, and some others coming out, Hugo, etc. I don't see how image quality from any other camera can compare to Alexa currently, except maybe the EPIC when put to the test.
I'm extremely excited about some of the EPICs upcoming films, including Spiderman to really prove to us they can beat the Alexa, regardless of resolution.