The short answer is that there will not be a “Media Center” available for Windows 10. To make this omission more slightly palatable to loyal Media Center users, Microsoft is making WINDOWS DVD PLAYER available for free to any Windows 7 or 8 PC running Media Center, that is upgraded to Windows 10. To get the Player, you will need to upgrade, then run Windows Update, then visit the Store.
The “small print” on the offer for free Windows DVD Player is:
If you have Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate, Windows 8 Pro with Media Center, or Windows 8.1 Pro with Media Center and you install Windows 10, Windows Media Center will be removed. For a limited time (the “eligible period”), on systems upgraded to Windows 10 from one of these older versions of Windows (a “qualified system”), a DVD playback app (“Windows DVD Player”) will be installed. Note: the Windows DVD Player may not be installed immediately; it will be installed after the first successful Windows Update. The Windows DVD Player will be available for purchase from the Window Store for systems that (i) are qualified systems but the eligible period lapsed; (ii) are non-qualified systems; or (iii) were qualified systems but Windows 10 was subsequently clean installed (in this case, Windows Update cannot detect that it was previously a qualified system).