ninearches:
The momentum rule....a forward pass should be called as a forward pass. The technology is there .
There is ball tracking technology (cricket is a great example) but not so sure if it works tracking a balls movement in relation to it's speed at the time of release (rather than the ground). Also I imagine Sky are unlikely to pay for it.
i.e) a flat pass from a player running will always be forward with respect to the pitch.