TOW is a "smart" weapon. It is wire guided. The gunner must keep tracking the enemy tank until the missile impacts. This keeps the gunner occupied and vulnerable to enemy fire from trigger pull to impact. This 1970's technology is truly obsolete. Now we have "brilliant" anti tank weapons like LONGBOW HELLFIRE (from Apache mainly) and the Infantry-borne JAVELIN. These weapons have all the "smarts" in the round itself. The gunner puts crosshirs on the target, pulls the trigger and leaves. The rounds guide themselves to a moving target by identifying a straight line, right angle, etc (something not in nature but in man-made objects), locking on and tracking itself to the target.
In Desert Storm, six guys with three pickup truck loads of Javelin defeated an entire Iraqi tank Battalion. Tank usefulness and deployment must be rethought. Too soon to tell yet, ut hings are changing. Throw in CHAMP technology, which would disable tank fire control computers, lasers, communications and more... and no one really knows how important tanks will be in the future.