In the words of Inon Beracha, CEO of the company which provided the technology for Kinect, "Apple is a pain in the ass".
They waltz into an industry with their billions of advertising dollars, get their users to make all of their content, slap on an exorbitant price tag, spray on the Apple symbol and sell 100 million copies. It's really not fair.
And, because it's made by Apple, everyone says "Hey, I bought my phone, MP3 player, tablet PC and computer from them! I'll buy this!"
To get an indication of the degree to which an Apple purchase is an informed purchase, 1/3 of iPad users have neglected to download a single app. No paid apps. No free apps. It's widely agreed that what sets iOS apart from all other smartphone operating systems is the app store (incidentally, the one part of the OS which the designer has no part in creating), and thus any purchase of an iPhone, iPod Touch or iPad should be based on the apps, right? I mean, you could pay half the price, and get a tablet PC capable of browsing the web, watching videos, listening to music and much more besides.
Sane and sensible people become insane and act on the spur of the moment when Apple is involved. I have seen it first hand. Something about their bright silver logo just drives people completely insane, and that's the last thing the gaming industry needs. In the PS1, PS2 and Wii, we had consoles which catered to casual gamers, but also had enormous numbers of quality games in a variety of genres. Apple wouldn't have that. Hell, there probably wouldn't be a single first party game, and everything available would be of the sort of quality of iPhone and iPad games. And it would sell.