I don't think Western developers are all that interested in 3DS or Vita for that matter. Vita will likely get more western support but only because it's basically a portable PS3 and PS3 ports will be easy.
3DS as yet is of no interest to casuals and the core market in Western countries for portables isn't that large. Let's face it, we'd rather play Mario Kart and God of War on home consoles. Plus we have a nasty history of pirating the hell out of portables meaning sales of western core games on either system (DS/PSP) in general weren't too hot.
Japan is another matter altogether. The Japanese prefer portables to home consoles. The Japanese market is also much more important to Japanese developers than Western ones (who don't do great business in Japan). So it's of no surprise that Japanese developers are supporting 3DS more than Western ones.
I don't think 'Bribing' Ubisoft for 3DS support is needed. 'Bribing' them for Assasin's Creed on Wii U might be.
Where Nintendo's strategy for the West is oddly lacking here is in the lack of any titles for the 'blue ocean'. Yes, Nintendogs and Cats but nothing innovative to grabs people's imagination. Were they expecting 3D to do that for them? Or have they accepted that Apple has stolen their market and returned to focus only on core?







