I'd be a huge fan of cans, too. But beyond canning, there's a missing middle bracket at least in the US that has long annoyed me...I was really, really hoping Budweiser's American Ale would fill this gap...inexpensive canned beer brewed with more flavor and less adjunct hitting a price point between craft beer and macro swill. If Budweiser had brewed a modestly hopped pale ale, canned it, and set the pricepoint a bit higher than their lager, but not in the steep craft beer territory, they might have interested me a bit more.
Then again, this may stem from the fact that I am a homebrewer and making a batch for $15 or thereabouts makes me loathe to spend 8 bucks on a sixpack of something. Cheap penny-pinching bastard, I know!
But cans are brilliant packaging...compact, lightweight, light-safe, easily stacked and stored, etc etc. Now its just a long fight to change public perception. Even among beer geeks/brewers there persist discredited ideas about how canning ruins the beer, so among the less educated beer drinking populace its a long uphill battle...and companies have to make money at it, so if the public won't buy canned beer, they can't afford to can beer on principle just because they know its a better mousetrap, so to speak.