come on now, lets not be naive fan boys
-You can get the Skydrive App for Android if you want skydrive, if you want seemless syncing you can use numerous other options in the Android ecosystem. There are literally multiple ways to do this, dropbox probably being the most popular.
-Xbox music I guess is a benefit if you really want it, but you don't really need it. Unless you really want to use your Xbox for music, there isn't much advantage to Xbox music right now.
-OneNote on Android works well, and there are multiple good options to open and edit other office documents on Android.
-Smartglass is on Android (and iOS), and this thread made me actually try it. Its comparable to the iOS experience, so just barely less useful than WP8. But lets be honest, the smartglass experience hasn't exploded, we haven't seen a ton of companion apps. Its only kinda useful, and if you are sitting in front of a WIndows 8 device, just use smartglass on that. So like I said before, barely slightly a benefit.
-You're the first person I've ever met who tried to tell me the gaming experience on WP8 is a benefit, but if you really want you can play words with friends on both your laptop and android.
There just isn't a huge advantage to using WP8 if you are in the microsoft ecosystem right now. There are a few things that work marginally easier if you have WP8, but most of these things can be done with third party apps just as well with Android. The majority of Android users also use the Windows ecosystem, so you better believe that developers have created ways for them to work well together. If you like WP8 and want to switch, go for it, in my opinion the benefits outweigh the tradeoffs. But if you are happy with Android and just curious if there is advantage with going all Microsoft everything, the fact that WP8 is by the same company that made your computer OS and productivity software suite isn't reason enough to switch right now.