Tender, flavorful pork. Or chicken. Or anything else you can stuff into a ziplock bag and gently simmer in hot water. That's the aim (and poor explanation) of sous vide -- a cooking technique where digital machines can help to ensure temperature consistency, and often throw in some WiFi or Bluetooth connectivity for added fun. This week at CES, established player Anova is showing off three new Precision Cooker models: a $99 entry-level device with Bluetooth; a mid-range model with WiFi that replaces its main cooker; and a professional-grade cooker with a touchpanel and what the team says is a "far more intuitive interface."