Belkin 4 Port Universal Secure KVM Switch - 4x Computer Connections, Single Head, DisplayPort/HDMI Video Interface, 4K@60hz Maximum Resolution, External Power - F1DN104KVM-UN-3 at TigerDirect.com
4-Port HDMI automatic video switch – 4K - Video Switchers
Belkin ships a low-cost 2-port HDMI switch | Engadget