No offense but most of that matters very little. In the case of the touch-screen, the Vita is fantastic; it's a wonderful feature for bite-sized games and it makes navigation excellent.
Why is the 3DS successful? Because Nintendo dedicates a large amount of resources toward content. Why does Sony do well with home consoles? Because they dedicate a large amount of resources toward content.
Why has the Wii U sold poorly? Why has the Vita sold poorly? Because neither one gets enough attention to establish themselves. When a console does not establish itself, third-party developers do not feel compelled to support it.
What does the Vita need? Well, let's look at what it lacks. It has very few child-accessible games. That's important in the East but in the West it's paramount. That's a key demographic for hand-held sales in North America. I've been saying for quite awhile that Sony needs to develop/co-develop several IP geared specifically toward younger audiences and see if any of them stick. Level-5's Youkai Watch would have been perfect but a game like that won't come to the Vita because Sony hasn't established that market. The new Digimon game might be a good start but it's an aging IP so we'll have to wait and see.
It also lacks social games like Animal Crossing. These are huge in Japan, which boasts many female gamers. Again, Sony needs to establish that market.
As of now, the Vita only has a niche, otaku-type market, which it simply inherited from the PSP.
I'd like to add that I hope Vita fans never become bogged down in the "it's all third-parties fault, they want the Vita to die" drivel that I see some fans fall back on, especially relative to a certain home console that's also struggling. This is Sony's responsibility. No one is obligated to develop for the Vita, no one is bound to take risks in order to establish a particular market on the Vita. The console manufacturer has to work to do that themselves. That said, Sony is doing a lot of work in Japan but the problem is that they only seem to be concentrating on the Hunter genre--yes, it's very popular, but people like variety. Variety is one of the reasons the 3DS is doing so well and the Wii U is not.
What I want to see is Sony working to bring the genres and game-types I mentioned above to the Vita, as well as more RPGs, which it's absolutely perfect for. They can make the Vita more successful, they just have to lay the ground-work.
