O.o... A year? At a year chances are they did not have that shop, but rather, an older version of the original shop (pre current shop). - I know almost a year ago that you couldn't even open it at all when I found the game.
Anyway.
I imagine its not available in this update, Just "mostly fleshed out"
You can sleep in its bed though, That works. I know cause I slept in it once.
I highly doubt one of the little triggers in this update makes it available - but there's still at least one (or maybe two... >:( ) little things I haven't solved that, who knows, maybe does.
But I imagine when it is available, It'll actually be properly usable, liek you'll be able to open the shop up and customers will walk into it.
probably.