Just this spring, Sierra Nevada joined the fray with canned versions of their Pale Ale and IPA. New Belgium Brewing Co. has also just released their new Shift Pale Lager only in cans, a nod to what we all crave at the end of a long shift.
Yes, it's a trend with definite market appeal. Kind of a retro throw-back, "stick it to the man" kind of a thing. But it's not all about striking a pose and looking cool.
The enemies of good beer are light and oxygen, which take a beer from fresh to skunked in no time. In a can, beer is 100% protected from both. Cans are also lighter, less prone to breaking, and cost less for breweries to both produce and to ship.
On the consumer end, cans are easier to carry to the beach or on a boat, and you can often take them into places like stadiums or parks where glass isn't allowed. Aluminum is also easier to recycle than glass bottles in many places.
If you're worried about beer taking on a metallic taste in the can, that particular nuisance is long gone. Cans are now lined with a polymer that prevents actual contact between the beer and metal (though it usually does, admittedly, contain some BPA).
Are you ready to embrace canned beers, or are you sticking to glass bottles?