Ok, long post, go!
First off, regarding Nintendo:
Nintendo has been messing up some stuff, but they do seem to really be trying to get their shit together. They made their online shop far more appealing to indie developers, they're making a couple new IPs on the eShop, so they're embracing digital , and Club Nintendo actually rewards people who buy new as opposed to punishing everyone so that those who bought used are punished more. Plus they've been working together with Platinum a lot, they've got a 3rd party exclusive from Monolith, and they seem to be getting a little buddy-buddy with Atlus lately.
It shows that Nintendo knows they made a mistake, and they're actually trying to fix it. Not just say it, but actually doing something. They aren't doing it as gracefully as some other companies, but at least they aren't trying to screw people over. Maybe having their first ever yearly financial loss slapped some humility into them. Capitalism at work.
As for the other two:
First off, I get the feeling that people are overestimating just how big the difference between the WiiU and the other two systems are going to be, and everyone is expecting a repeat of this generation. Will the WiiU likely be the least powerful console this gen? Almost certainly. But 1: Odds are we aren't going to have another Wii-360/PS3 difference. The HD-SD gap was a very clear difference and a big limiter on the Wii. There isn't really a gap in technology that big this time around. And 2: Power =/= Success. We should all know this by now.
Still, as for the consoles themselves...
Nextbox:
Microsoft seems dead set in its attempts to make the XBox brand a "multimedia entertainment device" or an "entertainment machine" as opposed to a game console. No attempts at new IPs, and not even a wide roster to choose from in a backlog like Sony and Nintendo. Instead they seem to think this whole "timed DLC exclusive" business will make them the preferred version of multiplatforms. One of the big reasons people got XBox versions was because everyone else was getting them. But being the big system last time around doesn't ensure success, both Sony and Nintendo have gone through that.
The thing is, with XBL becoming more and more inconvenient and exclusives becoming more and more non-existent, what can the NextBox actually offer that a PC can't do better? I'll likely be avoiding the NextBox. I might like Halo as much as the next guy, but if I won't buy a console for Mario alone, there's no way Halo by itself can get me to buy it over the competition.
PS4:
Sony's a far more interesting case. Like Nintendo, Sony seems to be trying to fix some things that went wrong and improving some aspects like PSN Plus, but stubbornly refusing to fix other matters like the constant firmware updates. If the launch price of the PS4 really is $400, that seems reasonable. But there's a lot of stupid things Sony can announce between now and then, first and foremost being the anti-used games tech. Then there's lack of backwards compatibility, but a recent report speculates that Sony will use the streaming service Gaikai to stream PS3 games on the PS4, which raises a lot of questions.
As far as exclusives go, Sony still has at least 2 very solid second parties in Naughty Dog and Sucker Punch, so we can rely on a decent amount of exclusives. They also have a potential killer app in Last Guardian. I'm also curious to see if they'll make any changes to PSN on either the consumer side or the developer side. Right now I'm not interested in the PS4, but they might be able to convince me.
So yeah. So far I'm good with the WiiU and a good laptop. Maybe I might get a PS4, but there are plenty of ways Sony could convince me not to get it. Plus, launches aren't always a great indication of the future. So even after all that, only time will tell what I end up getting.