Are you talking about virtual reality?
If so then in someways it could be of use with certain programming creating lifelike scenarios but you still have to be careful if a player say a QB is trying to avoid a passrush for example while going thru his reads. He could still suffer a freak injury while trying to avoid something he sees real. It would be best to keep seated while using headfakes to avoid and using a button to throw a pass. All in all tho real simulation and contact is neccassary to get ready for the season.