A:AnswerNot sure about the PS4, but it works fine with my Xbox One and my PS3. Just got done watching some football on it and it looked great. I didn't notice any lag at all.
A:AnswerBest Buy, if your local store does not have it in stock, they can have it shipped to your house or store, just call your store and they will get it for you one way or the other.
A:AnswerNo. I use my samsung connected to my laptop connected to my Vizio TV. No mirroring option on the TV. A Bluray with mirroring option is also available.