HOT have said they're working with Microsoft. But the press release only contains a non-specific quote attributed to Microsoft.
And no one's seen a HOT watch yet...
Or a Kreyos Meteor for that matter.
Although there's at least some photos of hardware on their website rather than renders. Kreyos reckon they've 5000 units on a container ship somewhere at the moment.
If either of them actually exists/starts shipping/works with Windows Phone, they can have my money. Until they're shown to exist/work, my credit card's staying in my wallet.