IMO, it may be quicker, but accuracy is still going to be in the hands of the individual placing the cross hairs, even in the initial cross hair placement. It would be interesting taking a descent shooter and pairing them against a sniper. That would be the real test. Then, a sniper vs. a sniper.
For me, it would be fun to experiment with but in the long run it would take the fun out of the reason that I shoot. I would be ashamed to be packing that while elk hunting. That set up basically tells the world, "I can't shoot worth beans so I need assistance."