Many of a company's operational processes have become a lot more efficient over the past decades, partly with the help of automation and computers.
Above the factory floor, middle management of corporations gets more efficient as well. Computers take over routine tasks, and slide/dice data so it becomes easier to make decisions.
Human communication among decision makers is pretty inefficient. People are bad at formulating and selling their ideas. Presentations have helped though: they have replaced long-winded memos and forced people to get to the point faster. Visuals are easier to digest, and more importantly, it is faster to skip through useless pages of a presentation (PGDN, PGDN) than looking for "the meat" in a text document.
This realisation might help you with the design of your everyday presentations. It should look decent. It should get to the point. It should show interesting, unusual, unexpected facts and insights. You want to get to a decision, you are not aiming to publish a complete, scientific document.
Here is where my presentation app SlideMagic comes in, adding even more shortcuts to make corporate decision making more efficient, and less cumbersome, boring and time consuming.
Image from WikiPedia