Twitter features we’ll see first:
* Delayed Post will move from Blue to free.
* “Verified” will become “proved their identify using a state issued ID” (or similar)
Long term:
* Accounts tagged based on content
* Whitelist / blacklist filters
* Publish / subscribe to filters
Another prediction:
There will never be an Edit button. It’s obviously ripe for abuse.
Instead we may see certain accounts (politicians for example) have unalterable and un-deletable content, in order to preserve history. Today it can be deleted, which is also ripe for abuse.