Coal Companies will never completely switch to natural gas. Natural Gas (turbine) plants are really only used to supplement times of very high demand, and with so many big power consumers (think automotive manufacturing plants) shutting down, going out of business, etc, there hasn't been much demand for natural gas plants lately.
My previous employer - American Electric Power - purchased a NG plant in Dresden, Ohio back in 2008 or '09, and hasn't run the thing yet.
Coal is still substantialy cheaper than Natural Gas, and is still much more efficient. You have to burn a LOOOOOT of Natural Gas to turn a turbine.
And to address your other comments; yes, gas DOES have a "conveying" system - it's called piping. And imagine how much we'd need if all coal plants were replaced with NG plants. Ever heard of "transmission and distribution"? It's one of the biggest aspects of the utility industry - moving electrons around this country. Being a scheduler IN the Utility industry, I can probably pretty safely estimate that it'd take 20 YEARS to meet the T&D requirements of an "all-Natural-Gas" power generation demand. Why do you think the "Pickens Plan" never panned out?
http://en.wikipedia.org/wiki/Pickens_Plan <- Scroll down to the "timetable" section... Even Pickens estimated 10 years just to meet 22% of the country's needs. I'd say that's plenty of time for my company to switch gears.
Plus, there are TONS of other materials that have, do, and will continue to need conveying systems - coke (not the soda,) minerals, stone, wood, etc. And lastly, being a project controls professional really sets me up for work in nearly any industry. I'd LOVE to become a scheduler for nuclear power generation - I get contacted for jobs all the time. A few more years in the industry and I'll be golden.
Personally Gumby your comment sounded like a bunch of conspiracy theories and fearmongering. Inflation has been here for over 40 years. Hell my dad had to install a locking gas-cap on his 1972 'Cuda - IN 1972 - because of inflation! So go order some 99-cent cheeseburgers, rent a $1 Redbox movie and chill out, man! Life's too short to spend all of it being paranoid.