Ribbon farm has an interesting and well written account of the changing notion of home.
It is an interesting concept, for some of us, especially as we have movable offices, or 'third spaces' one can easily survive in cities above a certain size. Hiking trails, a park, a few coffee houses, etc being enough for some people who are for instance writers, or software engineers.
A very interesting discussion of home, I myself however am an Irish national who is living in Luxembourg. I still end up in an Irish bar of course every so often, and am part of some expat community. Phones and facebook of course act as a sort of pacifier.