Wasn't there news that the Media Center would be sold separately.
As to Media Center I never really used it or cared for it. I started using the Modern version of WMP about a month ago, and find it really not all that bad. It loaded up all the music placed in the music folder once it was pointed to that folder. As to WMP I haven't used it since gong to the Modern version.
I use Kodi (formerly known as XBMC) as my media centre, and haven't looked back since, but I think it's not enough for some people and it's something related about recording TV streams or something like that.
The Start screen
Full-screen Metro apps
These two are still available on smaller devices, or by switching to touch mode. Additionally the windows can all be easily maximised.
The two-headed Internet Explorer
These two were stop-gap measures that have been reanalyzed and replaced. RT would always have compatibility problems, and Spartan will be replacing IE, with Windoww 10's IE being a stripped down placeholder
The Charms menu
Admittedly these two are a bit of a loss, but Windows 10 is still a Technical Preview and things may change.
Windows Media Center
This was disabled in Windows 8 unless you paid for Pro and more, so technically Windows 8 didn't have it either
From SkyDrive to OneDrive
This was a name change due to legal issues, and Windows 8 also uses Onedrive also so the point is moot
The People hub
I don't know much about these two things; I never used them.
Overall there are maybe a couple decent points; but there's a lot where it seems that the author, to put it nicely, is misinformed about the current and past state of that feature.