The reason they say you can't use it above 10,000 feet is to do with cooling. At higher altitudes the air is that much thinner that it no longer cools as effectively as it can at see level so a lot of fairly high powered compact electrical equipment has an upper recommended altitude for operation to prevent overheating.
When on a plane although you are strictly speaking at 30'000 feet you are in a controlled environment that is maintained to be equivalent to about 6-8000feet. so it will work no problem.
Depending on the airline you may have to operate it in "plane mode" to disable to wireless though (and in fact is that not a clue, that they have an plane mode)
So yes, a touch will work in a plane, the same as it would work underwater in a submarine even though they are not waterproof