"Why is Vita doomed and Wii U isn't?" On that subject from earlier in the thread, I think it's important to distinguish between known factors (i.e., things that are directly stated by evidence as having happened or most likely happening in the future) and unknown factors (i.e., things that we can only assume based on current situations and trends). That can explain some of the opinions that have been stated.
We've learned some things with Vita recently. We've learned that publishers are still willing to make games on it. We've learned that games can sell decently on the platform. Perhaps not outstandingly, perhaps not great for anything but niche software with low advertising costs, but decently. We might also say that we've learned that it isn't going to take off to a vastly improved level of health - though the dust is still settling.
With regards to unknown factors, can we say it's improved? I'm sure that we can. When we see developers announcing games for the system, it's much easier to believe that there are future games to be announced with selling power.
With regards to known factors, can we say it's improved? A little: we know about new games now. But it's also harder to believe that Soul Sacrifice will have outstanding performance now that we've seen the result. It's no God Eater. Of the games that are announced and known, there are few (none?) with significant selling power. I think this what was being referred to.
The Wii U's situation is not immensely different. But it's still sold more units at this point than the Vita or PS3 did at this point in its life, and we've got some known and announced titles from franchises that have had sales giants in the past. However, it's hard to believe that there are a lot of unknown third-party games in the future. Maybe the Nintendo games will sell as well as the Vita's titles, but it's hard to say what will happen right now - there's surely only so much that they can get out of Mario.
