They don't see that confident in it. Not even a video of it to even show us what its like and its out in a month
They're just farting this out because it was likely already in development from the inception of the Labo development and has been finished for a while. Nintendo doesn't seem very intent on marketing this much.
Of all the Labo concepts this actually seems to most interesting, so it figures they don't give a shit about it, lol.