The much-anticipated and much-leaked slimmer version of the Xbox One console is now finally official. At E3 today Microsoft took the wraps off the Xbox One S, which is 40% smaller than the original Xbox One. It has 4K support, however this doesn't mean you'll play any 4K games. Instead, this is all about you being able to watch high-res streams from Netflix and Amazon, or 4K Blu-Ray discs. On the other hand, HDR TV sets are supported too, and some games will do the HDR thing - first of which will be Gears of War 4. The Xbox One S has a built-in power supply, so no more unsightly...
Source: http://www.gsmarena.com/40_smaller_xbox_one_s_arrives_in_august_starting_at_299-news-18803.php