A year is probably not enough time to notice the changes in a place you haven't seen (especially if you arrive at a time when not much is happening, as July in the Nordic countries).  However, there might be a couple of things that I have noticed:

• There is more foreigners than before.  Not many, but at least the attitude from general society is slightly different.  I don't get weird looks for speaking Finnish anymore, at least in Helsinki.
• There seems to be more people working in July than before.
• There are some areas of the metropolitan area of the capital that have undergone further development, like western Espoo.
• The airport and the city are still the same.

Maybe I'll notice more things in a few weeks, but that's it so far.