A Microsoft "Support Engineer" on the Microsoft Answers Community site says tiles don't sync between PC and Tablet, not yet anyway.
"I would like to inform you that this feature in not currently available in Windows 10. However you may sync other
Windows settings. I suggest you to refer to the article provided below and check if that helps.
http://windows.microsoft.com/en-my/windows-10/about-sync-settings-on-windows-10-devices."