Yeah, it's actually a fairly old (but still interesting) observation that very large corporations are a form of top-down central planning. In fact many old-school communists first got inspired by late-19th-century capitalism's trend towards managed technocracy. There was a large movement in business that argued that production could be scientifically optimized using statistics, data collection, scientific management, etc. The communists just took it to its logical conclusion and asked, why not organize all of society in the optimal manner, using principles of technocratic scientific management? Even that argument was more or less originated by capitalists; some of the large industrial trusts argued that there was no problem with monopolies, because they were simply the most efficient, scientifically managed form of industrial production, unlike the messy, inefficient web of competing small businesses they had replaced. So really the only thing they disagreed on was how the profits of the centrally managed monopoly should be distributed.

There's an odd amount of borrowing in the other direction, too. Many large businesses do realize that they internally are basically inefficient, bureaucratic command economies, mirroring some of the problems with the Soviet system. So they introduce some of the same attempted solutions that the Soviets tried: intra-corporation pseudo-markets, competition and awards, recently the trend of "gamifying" workplaces, etc. (At the risk of self-promotion, I recently wrote a bit on the latter similarity: http://www.kmjn.org/notes/soviet_gamification.html)