OK, more seriously speaking, culture tends to follow geography and people (especially 300,000 compared to 127 million) will not tend to like being united with a completely foreign culture. Until more recently, control was dependent upon geography to a large degree. Living in different timezones can still be a PITA for coordination.

Iceland doesn't have that many natural resources. It planned to get cheap power by flooding its nature in order to smelt aluminium from imported bauxite, but it will be interesting to see what happens to that right now.

But there is the case of the Arctic. That will drive even Norway to full EU Membership, in due time, pace Chris Cook.