I'm getting a bit sick and tired of all the emphasis on the Negative impacts related to the loss of permafrost.  We don't actually have much infrastructure to be impacted.   In Alaska there will also be POSITIVE impacts.
More land will be suitable for farming and the climate will be more suitable too.  Who in Alaska doesn't want a few more frost free days?  Future infrastructure construction costs will decrease as we no longer have to deal with permafrost.
The rest of the globe may be worse off, but not Alaska.