What is basic difference between WCF and webservices?

There are basically few difference which makes WCF more powerful that to the asp.net webservices,

1] WCF services are self hosting means they dont need IIS setup
2] WCF works on DatacontractSerializer while  web services works on xml serializer
3] WCF can handle private properties and fields
4] The DatacontractSerializer can translate the HashTable into XML.

regards,

"Please give me your valuable comments to improve my knowledge :) "