There are a lot more who use their ecosystem than you think. All of their services work very well together, the Music and Video services have anything I could ever want (seriously, more current TV shows than anywhere else I've seen), the email calendar and other things work together, Skydrive is incredibly useful.
If you don't think Microsoft's ecosystem is competitive, it tells me you haven't tried it.
I didn't even know MS had a video service. A little Googling and I got to "Xbox Video". I thought that was only available via the Windows 8 app (or Xbox) but it looks like any Silverlight-capable browser will work. e.g. http://marketplace.xbox.com/en-US/TVShow/The-Guild/Season/0/...
If you don't think Microsoft's ecosystem is competitive, it tells me you haven't tried it.