@Chark
You aren't really grasping just how tenuous the situation for the Vita really is at the moment. You do realize that after factoring in for market expansion in the intervening years. The Vita is actually performing just a little better then the Virtual Boy. Which was a console that lasted all of six months on the market. The market today is about three times larger then when the Virtual Boy entered the market, and it sold three quarters of a million units. You do the math for yourself.
Granted Nintendo is fast to abandon products that aren't doing well, but even Sega with its die hard support when it came to devices. Couldn't salvage a console in the form of the Dreamcast that sold basically on par with what the Vita has sold thus far. Once again adjusted for market expansion. The Game Gear probably performed better then the Vita when it was widely available, and that was an extremely expensive gadget for its time.
I won't even go into the horror stories of the consoles that weren't from major players that failed in less then a full year. The point is this the Vita is accounting for a little over one percent of current generation hardware sales. I think that adds up to justifying about one square foot of retail space. That just isn't enough to sell any gaming device out of, and anything trying to sell out of such a small space is bound to look severely unappealing.
If this isn't a recipe for falling out of the market. I want to hear your definition of what it would take.