Haha. I feel like the setup in games stores in the UK (at least where I live) is so different than the US after reading Sales' comment.
For example, in the two different Tesco's by where I live: PS Vita games are next to PS3 games, with console bundles next to them. 3DS and DS games are all mixed together in one big clusterfuck, not separated, next to Wii games, at the other end of the games section.
In my local Game: PS Vita games were in their own section on the far wall between the two doors for a very long time. 3DS and DS games were mixed together in a big clusterfuck (again) next to the PSP games, which were next to the PS2 games.
Now they redesigned it so there's adjoined shelves which go PS2 games -> PSP games -> PSV games, and the PS3 games are round the back of the shelf. Then they moved 3DS & DS games (now separated) to the other side of the store with the Wii games.
Even in HMV there's a Sony section of the store with PSV & PS3 games together, and then 3DS & Wii games on the other side.
Point is, I don't think I've ever seen 3DS and Vita games next to each other. Seems odd now I think about it. Maybe brand loyalty plays a big factor over here because they make more of a point of having a Nintendo shelf; a Sony shelf and a Microsoft shelf.
But anyway, I digress. Poor Vita. Next few weeks will be interesting though.