Do I have to

tell you why I did this video? I don't. Technically impossible or nearly impossible to build in 1999. Still probably inconvenient to conceive. But yet easily imaginable and as easily visualized on the video. How many times have we seen human kind envisioning something that for sure can be seen impossible to be built today, yet there has been at the same time consensus regarding future feasibility. Quite many times.

Does this mean

that just because we can imagine and agree on it, there will be all this inventions built later on? I'm quite sure that it does mean exactly that. Give me a counter example of a technically sound idea that was thought to be feasible but was never executed. There are none.

In this case

the knife is the traditional instrument which has got additional power of augmenting it's near surroundings, specially the bread. Alternatively this could be what the user is seeing on goggles but in this case I like to propose that the knife has the ability to augment. It is more interesting that way. The calorie display could be alternatively a physical display in the knife but as there are multiple imaginable use cases for the knife we keep it solid this way.

Obvious use case

here is to find out at the moment of eating what is the exact correct amount of bread to be consumed so that your monitored total balance of in/out energy stays as planned. You can imagine lot of similar scenarios for the same knife or parallel ideas for other kitchen ware.