Connectivity can come through WiFi, BlueTooth, HSPA+ 42Mbps, 4G LTE and even infrared transmitter for remote control functions. User interaction sees some new tricks however, eye tracking software will scroll webpages and documents as you read through them and those who despair over smudges on their screens will like the ability to control the phone with a finger hovering over the screen, not quite touching it. It bears two cameras, a 13MP on the back capable of recording at quite respectable resolutions as well as a 2MP front facing camera for video calls. On this translated page, the only connectivity seems to be a microUSB port, but there is is mention of MHL which can provide HDMI out, or you might be able to use the infrared transmitter to send your pictures and movies to another device. Charging can be done wirelessly via Qi in theory, though that did not work so well during the demonstration. You can follow the various links for a bit more detail but until a reviewer can get a Galaxy S4 in hand to benchmark it and perhaps tear it apart we don't know exactly how this phone will fare against the competition.
"Samsung Galaxy S4 will be available from the second quarter globally including the US market, partnering with telecom carriers such as AT&T, Sprint, T-Mobile, Verizon Wireless, as well as US Cellular and Cricket, Samsung said. In Europe, Samsung Galaxy S4 is partnering with global mobile operators such as Deutsche Telecom, EE, H3G, Orange, Telenor, Telia Sonera, Telefonica, and Vodafone."