Tsubasa Reservoir Chronicles has come to an end after six years. Syaoran and Watanuki escape the time/space void when the clone syaoran disappeared but they still had to pay a price. I don't know what either of them paid but it was enough to send them both home. Syaoran came back with a feather like Sakura's but it was blank. The feather he has and the one she has (one that is her own with the design on it) go into them respectively and they collapse but Kurogane and Fai catch them. Sakura is out immediately but Syaoran is still awake. Kurogane bops him on the head gently saying that since the clone left without getting a hit from him, he'd take it. Fai states that they'll be starting from here and Syaoran thanks them all as he falls unconscious in Kurogane's arms, looking beat all to hell. It ends with the sun coming up in Clow country and the dream finally ending.
I have read that there will be a special chapter released on Oct. 7 to commemorate the six year manga's ending. Hopefully, we will learn what price was paid, where the gang will be going, and what 'Syaoran's' real name is.
Side note: xxxHolic has not ended nor has it been stated when it will end.
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Addendum!
The 40 page epilogue has been release and we find that answer to all questions answered! The price 'Syaoran' paid was that he had to continue his journey to find a world in which they can all be together. The clones that disappeared left behind a feather each, containing their souls. The clones now live inside their originals, still alive and waiting. 'Syaoran' wants to find a world where the clones can have bodies for the souls within them. Watanuki's price, conversely, is to stay in one place, the shop, for the rest of his life. Fai, Kurogane, and Mokona have chosen to go with 'Syaoran', 'Sakura' decided to stay in Clow because she dreamed that if she were to leave with them, she'd only cause them more sadness. As they leave, 'Syaoran' and 'Sakura' tell each other their real names, and it turns out they have the same name after all. "Tsubasa".
And so it all comes to an end. Yay!