Beyond the obvious fact that every idea that comes out of Double is not inherently Schafer's,
I'm really intrigued and excited about this game, I love those little Russian Stacking dolls and the time and setting looks fantastic. The mechanic may need a little tweaking however to involve a touch more stealth or trickery to it, although it's certainly not required.
This seems very like the old Buger King games where the Stealth was present but not necessarily integral, which I think is fine enough.
And again, kids, let's remember one important fact:
When you see the credits for a 'Double Fine' Game, Tim Schafer, as great as the guy is, isn't the only one you see in them...