I've written before about Leap Motion, and how it's still not entirely clear whether gesture recognition is ready for mainstream computing, but this is a neat idea:

As any chef can attest, swiping, scrolling, or clicking through a recipe with fingers covered in dough can be a messy, insurmountable feat – not to mention potentially damaging to your devices. Reaching into Allthecooks Recipes with Leap Motion, however, keeps your device batter-free.

Fancy Minority Report style cookery aside, I'm not sure I want my MacBook in the kitchen, and I've have thought the iPad would be a much better fit for this kind of thing. Who's thinking that this might well be how Apple is planning to utilise its recent purchase of PrimeSense?