Yay it's about time!! I REALLY hope they use the nice thick ones like AA does - they use CASPER ones and they are really nice. If they use something thin and flimsy like the duvet it won't be all that great.... just flew AA from HKG to LAX and the sleep was definitely better... catering on AA is another story but the sleep was good.
Also dual air vents on AA above each seat are a real plus in J.