Possibly.
I think it was just a bad port... i.e. cash-in. Maybe built initially from whatever engine they use in Wii cod titles.
But, Activision has yet to mention anything cod + Nintendo related and this cod was never said to be exclusive, I don't think.
So its very possible that it will be on both mobile platforms and possible iOS/Android latest stuff in the near future. Tegra3 stuff looks as good as that or better. I'm positive the iPhone5 and 2013 Androids will match Vita's hardware. So this could just be Activision planning ahead.