Doubt it. The ground will just look emptier as the smokers nick outside and stand 20 metres from the ground.
Next I'd like to see a ban on that other dangerous drug,alcohol, from being served inside the ground.
The catering needs a overhaul too...no fat laden pis,chips etc but healthy alternatives.
Scarves,belts,shoelaces etc should prohibited as they could be used as an offensive weapon.
Hot flasks of soup/coffee etc should be a big no no as they could scold the person sat next to you etc etc etc.
Welcome to the future.
BTW I have no objection to smoking being banned in places such as restaurants and other confined spaces.