In the world of countertop drinks appliances, there are two clear leaders: in one corner, we have Sodastream, the undisputed champ of home soda making. In the other, Keurig, which has beaten back all other challengers to its proprietary-coffee-pod-system crown. So far, the two have grown their share in their respective markets without clashing. 

But this could soon change, with word that Keurig is developing its own pod-based soda machine, codenamed Geyser. Coca Cola, a part-owner of Keurig, will be licensing pods for the device, and the Dr. Pepper Snapple Group is reportedly on board as well, giving Keurig a wide range of well-known brands to pull from. 

Will Sodastream make deals with the Keurig team's rivals? Will consumers find enough reason to make soda in a machine, instead of opening a can from the fridge? Which machine will provide better carbonation? This is one showdown we'll be watching closely.