up with the increased demands placed upon the people creating the games. On June 14, 2010, during E3, Microsoft revealed its new Xbox 360 S or Slim. It is smaller and quieter, with a 250GB hard drive and 802.11n WiFi. It started shipping to US stores the same day, and in Europe on July 13. The OnLive cloud-based gaming system is one of the first cloud gaming services. High-definition graphics in video game hardware Cathode ray tube-based display units had begun to phase out in the 2000s, replaced by inexpensive flat-screen televisions and monitors which had far higher screen resolution and refresh rates. Video game hardware began introducing support for the new High-Definition Multimedia Interface (HDMI) standard, allowing for resolutions up to 4K (3840 × 2160 pixels), which itself stressed the need for more powerful GPU cards with faster processors and larger memory. Game engines such as Unreal, Unity, and DirectX added support for improved texture mapping to support high-resolution textures to give photorealistic graphics in games. Microsoft and Sony both released their next console generations, the Xbox One and PlayStation 4, in 2013. Both expanded on features from their previous consoles with the added support for high-resolution graphics, and more support for digital distribution of content with additional storage space. The Xbox One had an initial flubbed launch, as Microsoft wanted to require users to be always connected to the Internet, along with persistent use of the Kinect motion sensor, which in turn would have given certain benefits to players. However, these decisions were met with negative feedback in the months prior to release over their privacy concerns, and Microsoft revamped their policies. The Kinect, though initially bundled with the Xbox One, was made optional, and a year after launch, Microsoft opted to end Kinect's production for the Xbox One. Nintendo still kept to its own path. The company decided that the Wii may have lost a portion of core gamers and developed the Wii U to draw this group back in. The Wii U, released in 2012, included a tablet-like Wii U GamePad that included controls and a touchscreen display that acted as a second screen during gameplay, along with support for Wii Remote controllers, and included backward compatibility with Wii games. The Wii U was a commercial failure for Nintendo following the Wii; while the Wii had sold more than 100 million units, the Wii U only