It's not often that you get to see a presentation and think, "Wow." I'm not talking about the "whoa dude! That was so awesome!" kind of reaction. What I'm talking about is when you know that the message you just heard was exactly what the presenter meant for you to hear, and that the whole experience was simple and clear.
I recently had this experience watching the keynote at Apple's World Wide Developer's Conference. 
Go ahead, chuckle, snort, you can even post a snarky comment about me being an Apple fanboy. It's alright. Because it's true. I love Apple and everything they stand for. I'm not saying that they are a perfect organization or that this presentation didn't have any flaws (in fact, there were two obvious errors in this keynote). It's just that their simple, direct approach to business, product design, marketing – and presenting – make it so that little, if anything, is misunderstood.
Go ahead and watch just a little bit of it.
Notice how there is rarely any text on the screen.
Beautiful, high quality images are used in place of bullet points.
Simple, easy to read graphs.
Transitions are used appropriately to create emphasis.
Not to mention a clutter free stage, large projector screen, the use of light humor, repetition, seamless transitions between speakers, and more.
Seriously, just watch a bit if you have some time.