A:AnswerThis monitor does have HDMI to connect to a console, but note that while the monitor supports up to 75hz refresh rate, it is limited to what the console supports. Older Xbox's support up to 60hz.
A:AnswerYes, or if the Lenovo you have has an HDMI or VGA port, you could use this as a second monitor if it is supported. If you do this, please keep in mind that in order to get 75hz and/or Gsync, the PC/laptop to which it is connected must also support these features.
A:AnswerI saw someone said no but I don't understand why not. I believe the Xbox one supports up to 120 Hertz, so I don't know why the monitor would not support the Xbox one. I think I'm going to purchase one once Best Buy opens again. If I remember/ if I do I will come back here and let you know.