Cynical thinking ahead.
What has been long considered one of the most wealthy markets is a country descending into a billionaire controlled kleptocracy. And they're pissing off every other country in the world with tariff blackmail and punishment (or extra judicial executions) for any country that fails to bend the knee and fawn obsequiously enough to their leader.
One of the most populous markets is a country that manufactures approximately 100% of all consumer electronics, and will have a hundred versions of this available for 10% of Pebble's price on AliExpress as soon as it shows any signs of gaining market traction anywhere (quite likely stolen or "3rd shift" ones from Pebble's own outsourced production line).
India, who these days has more than enough local skill and experienced ex-H1B tech people to create this from scratch at home (and at least some with a deep resentment over how they were treated by US tech companies while they were there)?
One of the no longer EU markets is suffering post Brexit austerity and isn't likely to be buying a heap if tech toys - even if their fucked up new importing goods paperwork doesn't make it impossible to get your product into the country.
There goes about 40% of the planet's population.
That leaves, what? Manufacture locally and try surviving by selling to the US market at prices driven by US labor costs which'd make the product prohibitively expensive globally? South East Asia, who're likely to buy the Samsung copy over one from a US company? Russia, who (at least for now) is under trade sanctions for a US based company like Pebble? So perhaps Canada (until their southern neighbour make good on their threat to try and make them the 51st state)? South Africa? Australia and New Zealand?