Having come from an industry using electronics in massive amounts, yes, you're right, the cost of consumer electronics is a race to the bottom.

Consumer electronics, however, are mostly optional to human existence. Matter of fact, I'll go out on a limb here, (but it is one I'm pretty certain of, what with being a former EE and all) that consumer electronics are completely irrelevant to human existence. There were plenty of humans on the planet before Bell Labs invented the transistor. There were plenty of humans on the planet before De Forrest invented the vacuum tube. There were plenty of humans around before we even knew what the heck electricity was, much less figured out how to make it deliver porn-on-demand through wireless internet connections in mini-vans driving down the road at 75 MPH during rush hour. (yes, consumer electronics can do this now -- such progress, eh?)

Food isn't quite so optional. The reason why the world hasn't starved is because you, the North American farmer, have fed the world.

Further, consumer electronics aren't necessary to your running a farm. Sure, it might be nice to have an MP3 player while you're driving equipment 'round the fields, but it isn't necessary. Diesel fuel, parts, equipment, tires, chemicals, seed, etc -- those are necessary. And I don't notice any of them going down with the exception of Roundup/glyphosate. 

My argument here isn't the price of corn, per se. It is that corn is the vehicle for your income. People's salaries have inflated rather nicely since the early 70's. Someone back then who had a $25K/year job wasn't doing all that badly.

Today, $25K in most urban areas might get you a studio apartment and dog food for dinner.

When farmers have to expand their operations to keep their income up to par with inflation, you're having to increase your expenses (if renting land) or capital investment (if you're buying land). The W-2 schmoe just goes and asks for a raise. And if he's a union hack or government employee, he just sits there and has other people go get him some more income. All along the way, when gasoline prices rise, the consumer whines like a puppy when someone is standin' on his tail. Insurance costs go up? More whining. Housing costs? Whine, whine.

And when food goes up -- now instead of just the normal whining, you're going to have the morality police on your case, in addition to the usual suspects whining. 

How much throughput/capacity modern equipment has doesn't alter the overall issue: farm incomes have not kept up with inflation. City slicker salaries have. Matter of fact, city slicker salaries are the very metric the Federal Reserve uses to compute inflation.

If you're not going to stick up for why the facts show why you should be getting more than $4/bu for corn, trust me, the poverty pimps will crawl out of the woodwork to demand that you reduce corn prices.