I had been noticing that every time I went to sign into my Live Account, Microsoft was throwing up a minimal clean page to sign in and I just realized it was actually the Microsoft Account roll-out. Some of you might be still seeing the old page but I am sure you will get it soon. This is how the login page looks like, Notice it’s Microsoft Account everywhere instead of Live Account.
You might get a bit different left section, depending on which product you went to sign in. For example if you go to Hotmail, you would see Skydrive, Hotmail logo etc.
After you successfully login, you should see minimal account page which looks looks kind of boring because I expected tiles
New Billing Section :
It seems the billing url which was billing.microsoft.com is now being redirected to https://commerce.microsoft.com/PaymentHub/ which displays your Subscription, App Purchases, game Purchases and even Microsoft Points associated with Xbox account.
Billing section also has a revamped or probably new section called as Transactions which is a report center for all the purchase etc made from your account. Rest of things can be generated always except the transactions related to Microsoft points will be shown for a period of one year at most. Make sure to use the correct Account on top.
Another important thing to notice here is in case you have a App Hub Account or Any Software subscription from Microsoft, You will have a drop down as Business Account 1 Business Account 2, Personal Account etc. You can find this right next to your account picture, on top right.
Lets us know if you find anything more.