Twitter announced the change last May. Since then, we have not had news, but it seems that the change will become a reality on September 19.
Η company it won't remove the 140 character limit entirely, it'll just change the way it counts characters, as we've seen it do in the past.
For example: the URLs that used to count the characters as a whole.
This gave rise to an entire ecosystem of URL shorteners, until the company decided to integrate a system shortcut URL to the same Twitter in 2010.
The new changes are similar.
It changes the way it counts characters, without changing the central idea of the site at all: messages 140 characters. But the list of exceptions to the 140 character limit just keeps growing. So from September 19th characters will not be charged for the integration of any media (images or videos) but neither will the characters of the replies.
We'll see it in action very soon, along with the creative ideas of its users trying to twist words in every way to make their post meaningful. Let's mention that the main idea of the company with 140 characters, established the site as platform very quick update.