We're talking about a five-year-old here. I think it's absurd to think that any of us know what a mainstream productivity OS is going to look like by the time i

We're talking about a five-year-old here. I think it's absurd to think that any of us know what a mainstream productivity OS is going to look like by the time it affects his "job prospects". At that age, what matters isn't any of the material learned. It's the attitudes and self-conceptions that matter. If a five-year-old learns that he likes telling computers what to do and that he can get steadily better at it by exploring, that's a huge win for his future.