I was thinking about getting an Apple TV 3,but my main goal is to stream videos either from online websites or off hard drive from my Mac through it. my question is,is it worth buying just for this purpose? How is the Airplay performace? Is it lag free? Cause I came across many complaints regarding lag. Also I might want to use it for Netflix but some say it has the worst Netflix App and interface comparred to PS4/PS3/Roku etc?