As I said, "potentially profitable niche market." The problem is, Sony's Western strategy for Vita is almost entirely predicated on the notion that such titles can be major system-sellers, not profitable niche titles.
So are you defining a niche title to be one that doesn't move hardware to any degree? (Actually, I thought the Assassin's Creed White Vita Bundle did pretty well over here around the Holidays but I'm not sure how many were produced) Because 600k+ for a title does not seem to indicate "niche" to me.
I do wonder how many of the AC:3 Liberation bundle were sold over the holidays and how many more of that same bundle would have been sold if the price were $199. I imagine we'll see such a bundle later this year as I expect that will be the price point before too long.