This was referenced in an otherwise unremarkable TEDTalk I watched (Jane McGonigal’s Gaming Can Make a Better World) and I think this is probably the best thing. If you put in 10,000 hours at something, you’ve mastered it. Ten thousand hours into WoW, you’re god-tier. Ten thousand hours doing linguistics, you’re uber linguist. In the TEDTalk she said “ten thousand hours before age 21”, and while I haven’t read the thing I’m linking to, it probably explains the idea decently well. Whether the age thing is a factor or not, I don’t know.
That being said, I have very little time left to accomplish ten thousand hours at one specific thing. Reading books and using a PC, perhaps. No particular games or talents, though.
Anyway you can look up the TEDTalk or read the above link, or do neither because the sentence “putting in ten thousand hours to something means you’ve mastered it” pretty much sums it up.