Yes, it was different.
I interpreted the looking out windows, as sort of a metaphorical looking out to the horizon, seeing what it out there, seeing the horizon of the new day, new beginnings...not just "hey, look at the city of Tokyo"
It was a more serious role for Bill Murray, but not as serious as one he did in the early 80's (I think that was called Razor's Edge).
It wasn't utter hilarity, but it was sort of an ironic, deep movie.
I think some people are saying that they don't like it because they picture goofy, screwball comedies when they think of Bill Murray.
This was a different role for him, more of a thinking role. There were no physical comedy/slapstick to overcompensate his comedy (think Caddyshack), or silliness (think Meatballs or Groundhog Day/even Ghostbusters).
It wasn't action packed, but think the characters didn't do action packed things... Charlotte sat around waiting for her hubby... didn't know the language, couldn't do much. Bob, didn't know the language, and couldn't even understand the director of his commerical shoot. (hard to do your job when you don't know what the boss is saying)