Several articles (including this one http://www.rawstory.com/rs/2013/10/31/drink-it-while-you-can-study-points-to-looming-global-wine-shortage/) have been touting a report of an upcoming wine shortage. According to the study, demand out stripped supply last year by 300 million cases.
Funny I have not noticed wine rationing or odd even day policies on when you could by wine. Wine prices have gone up slightly in the past few years but no more than most things. Its true that demand for the very top end Bordeaux and Burgundy wines have gotten astronomical, but for the every day wine drinker the picture is pretty rosy. So let others panic and enjoy a glass of wine.