The first disappointing reason is represented by the announced cool hardware and software features, of course, based on rumors: 3D, unbreakable screen, eye scrolling, wireless battery and many other Sci-Fi specs.
Galaxy S4 Specs
In a few words, Samsung Galaxy S4 specs are limited at two kind of processors (Snapdragon and Exynos 5 Octa), 5 inches display with Full HD Super AMOLED screen at 441ppi/inch, 13Mpx foto/video rear camera and 2Mpx front camera, 2600 mAh battery, 2GB of RAM, Android Jelly Bean (version 4.2.2), 16GB/32GB/64GB internal storage and op to 64GB external storage on microSD, weight is 130g and 136.6mm x 69.8mm x 7.9 mm dimensions, WiFi 802.11 a/b/g/n/ac connectiviti, an advanced multilangual S Voice, and much more!Anyway, it's a good smartphone, but too far away by the rumored announced specs. Too bad! Its specs seems very closely to S3, and maybe in the next months the new Samsung Galaxy Note 3 will enjoy us with some hardware specs, that for now it looks to be a little bit from a near Sci-Fi era.