Xbox One will support Live in these countries at launch
Xbox One won't offer Live in every country at launch, but it has a concrete lineup of Live-supported countries that includes the US, UK, Australia, New Zealand, Russia and a handful of European nations. Check out the complete list below (image above from NeoGAF).
Without Xbox Live, games on Xbox One won't work in these regions. "Xbox One games are for activation and distribution only in specified geographic regions," a disclaimer on the Xbox One reservation page says.
The Xbox One requires an internet connection at least once every 24 hours, Microsoft revealed in the days leading up to E3. Without that connection, the Xbox One's ability to play games is locked down.
Australia
Austria
Belgium
Brazil
Canada
Denmark
Finland
France
Germany
Ireland
Italy
Mexico
Netherlands
New Zealand
Norway
Russia
Spain
Sweden
Switzerland
United Kingdom
United States