I do think a lot of people have tried to give up, and many have succeeded, since the smoking ban came in. Many pubs aren't swamped with people outside, so at best they've cut down.
I know people who saw this as an opportunity to finally give up, and even if it wasn't for health reasons, it's clearly going to be good for your wallet. Now drink is getting more expensive, that will pose a real risk to the rest of the pubs - as many now seek to concentrate on food. Nice profit margins on food, as there's no big chunk taken out as tax.
Fine if you want to go out for a drink and food, but it's getting harder to go out to simply drink and maybe make do with crisps and a kebab on the way home!