Three years into soda tax, sugary drink consumption down more than 50 percent in Berkeley. Consumption of sugary drinks dropped 52 percent among Berkeley's low-income residents in the three years after the city enacted a penny-per-ounce excise tax on sugar-sweetened beverages in early 2015, a new study shows. The study, which is the first to document the long-term impacts of a soda tax in the United States, suggests that taxation may be an effective tool in the fight against diabetes, heart disease and obesity. Source 3s.
Eventually resources will become more scarce and costly so the industries will take this as an opportunity to raise prices gradually. Of course you won't get a significant change now but with the current situation with health and economy it may end quite differently.