Last month, WhatsApp released a new feature where users will be aware whether their messages have been read or not. Some might have easily realised that the grey ticks have now turned blue; indicating that your texts were seen.
This new update has been seen as unnecessary as it will only generate excuses as to why one did not reply as soon as the messages had been read. This implies a sort of impatience here and how people nowadays seem to be so caught up on getting a reply as quick as possible with the emergence of wifi spots and 3G/4G everywhere that it’s "impossible’ not to text back.
Considering Facebook recently bought WhatsApp, this feature has definitely been influenced from the latter. There are also reports that as of next year voice calling will also be available via internet connection, a feature which is already available via Facebook Messenger.