With NFL teams set to kick off their pre-season next week, Microsoft today announced that the Surface Pro 2 won't be used during games anymore. Instead, the upcoming 2015-2016 season will see its Sideline Viewing System, which lets players and coaches review game photos instantly, be powered by Surface Pro 3s for the first time. But that's not the only change being made. Microsoft and the NFL are also going to start testing video as part of the Sideline Viewing System, including replays of questionable calls that referees can watch via the custom-made device. Even though this is only going to be a test run (over 20 pre-season games), it will be a significant move if it ends up being implemented in the regular season. Microsoft's laptop/tablet hybrid has already replaced the traditional paper method for most teams, and it could do the same with monitors on the field -- the current way of watching replays by officials.