Does windows 8 metro style application support push notification just wp7 if yes can some please tell me how I can do it with rest based WCF & subscribe to the channel created using winJS
Hello.
Yes, you can WNS to push notifications for tile, toast and badges. There are a couple of quickstarts here which should get you started:
http://msdn.microsoft.com/en-us/library/windows/apps/hh465460.aspx
Luis Abreu