There isn't really any winners or losers(in the traditional sense) as everyone seems to think.
Look at it more like this,
-if you own a 360 and you liked Microsoft's conference and announcements, that's a "win" for microsoft
-if you own a Wii/DS and you liked Nintendo's conference and announcements, that's a "win" for Nintendo
-if you own a ps3/psp and you liked Sony's conference and announcements, that's a "win" for Sony
Each of the 3 consoles had some good stuff to show, so a "win" is really just relative to whether you like what you saw out of your console of choice, they're not all mutually exclusive.
The only teeth strong enough to eat other teeth.