Overall, I think video reviews have been a great addition to the game. It allows for a smaller margin of error and catches infractions that the referees miss from time to time; it helps tighten the gap that's created by human error. It definitely drags out the game just a little bit, especially during critical times such as later in the game or overtime when momentum is huge part of the game, but overall I believe it's been a welcomed addition. Furthermore, it helps determine the severity of a penalty when things like boarding occurs. Offsides can absolutely be automated at some point in the future; I'm sure there's a way to sync the puck, skates, and blue lines all together to determine who actually crossed it first. Goals can be taken in the same direction as well, maybe even easier. All you would have to accomplish is to sync the goal line with the outline of the puck to determine if it completely crossed.