This just seems obvious to me. Granted, I'm only 16 and have had but one foray into the world of corporate employment, but the notion that someone can learn a skill early in their life and practice it indefinitely without expanding or improving upon it literally makes me want to laugh. The world simply moves at too rapid a pace not to constantly be learning.
The need to improve yourself as an employee doesn't exactly count as news. Intellectual stasis is career death.