The best of the best, is win win operation. Quality takes precedence over quantity.
We all know that the 805 Snapdragon was delayed and the 801 was just a stop-gap measure. Now that the 805 is out Samsung is releasing the real S5 but it is unfortunate because that means the S5 should have just been named the S4s or something. Samsung wants to be first to market with the SoC but it is actually a really smart game to play against the yet to be release iphone6 if this new phone hits the US before or same time as the ip6. This updated S5 will have a MUCH higher resolution than the ip6 with comparable SoC performance 2-3 months sooner than Apple.
It could also be a developmental device. One advantage Samsung has over many companies is there country which is divided as it is. Not to say it is a good thing in any way but they have a few plusses there. First they have a dense number of people in small and very well technologically developed area for research. Second these individuals are generally more well informed technologically in a much denser section of a society. Third there cellular/LTE existing network is above most others in the world. So they can throw out an item like this and get a much larger demographic outlook of a device or features etc in much less time because of their specific markets concentrations. This could be early development for the S6, this could be the next NOTE as well if you notice there are 3 apertures (3 circular and one rectangular) on the top of the unit but on the S5 there are 2 so the third larger open hole could be for the note's pen/control device. The charger port is generally on the bottom.
This could be an S5 Prime/premium (or whatever they're calling it) as well