there's no any difference between them coz tweet is more used in twitter like post in facebook, and post is more used in facebook like tweet in twitter.
well i am also curious about what more feature will facebook brings to us. It has provided all things to us.
in future there is seems to be only added of one new feature in future and that is live video chat with friends.
Our 3rd Payment:
The amount of 0.22 USD has been deposited to your Perfect Money account. Accounts: U5109356->U1187273.
Social media is a communication site to connect many countries and it is usual that change is always there in the corner and Facebook will not be closed