According to the official FAQ from the Xbox One site (link below) the Xbox One will only work in certain countries at launch:

Link


Australia
Austria
Belgium
Brazil
Canada
Denmark
Finland
France
Germany
Ireland
Italy
Mexico
Netherlands
New Zealand
Norway
Russia
Spain
Sweden
Switzerland
United Kingdom
United States

Xbox One games are for activation and distribution only in specified geographic regions. See game package and/or retailer product information, for each game’s specific geographic regions.

Source