An app like Currents should — particularly if it wants to actually be competitive with Flipboard or Zite — be pulling in news content from every source available, especially real-time sharing networks like Twitter and Facebook. Then it should apply smart filters and recommendations to those streams, to help news consumers sort and understand that information better. Instead, Currents feels about as innovative as your garden-variety app from a traditional magazine — in other words, not very innovative at all. More than anything, it feels like a giant missed opportunity.