I take it you own a $10 million house, a $2 million car, and you're too busy to visit forums like this.
oh wait... hmmm, dang, I never thought about this, but real people actually take into account their needs and the cost of the things that provide those needs. Yeah, funny that, huh? and from that perspective, If i can get a 24" computer with 4 GB of RAM, a 256 MB video card, and a 2.4 GHz dual processor chip in it, I don't see why I need to spend another 2 grand on a cinema display and 6 more cores.
the cost/benefit ratio drops dramatically. Hence, it is called overkill for the home user--not for the hardcore home movie/photo/graphics enthusiast.
and even if that weren't the case, who made you the god that decides that a machine pre-empting you is too fast? That sounds like a useful convenience to me. Not anymore overkill than having a machine that can do everything I never do in 0 seconds.