Is there some magical land where all you users are stringing your powercords across treacherous passageways, hallways and roads?
I don't know about you, but my laptop power supply isn't stretching across the room when I use it. At most it's like 2 feet from my actual feet, and the cord is tucked behind or underneath something, to prevent exactly what we're talking about.
The magnetic plug is overkill in my mind, and I'm sure that it costs more to manufacture than a typical power jack. But hey, if you're buying Apple, you probably don't care about the price anyhow.
So, you Apple users, enjoy your magnetized power plug. I'm doing just fine without it, thank you very much!