Planned range for the Boom Overture is 4900 miles, so only a little better than the 4500 miles of Concorde, which occasionally had to make a refueling stop going westward over the Atlantic. So it won't have the capability for transpolar or Trans-Pacific flights.

Seattle to Tokyo is under 4800. If they serve that route I will never fly anything else.

That's over 8,000 miles. An aircraft with that kind of unrefueuled range could go pretty much anywhere from New York, except Australia, SE Asia, or the tips of Africa and India.