How big does the PSVita price drop need to be?

[PlaystaionGamer]

thehusbo said:
£179 with a 4gb memory card and a game would do well.

Thing is it was already that price in some stores in the UK at Christmas with Assassin's Creed/need for speed/LBP or COD with a 4gb card and that didn't do much. It still needs more :/