Whatsapp has updated its web version to bring few new features. Now, you can do lot more things on Whatsapp for web. On Whatsapp for web, you can change your profile picture, update status and create new group.
Now you can also delete the conversation or send it to archive. Whatsapp has also added few keyboard shortcuts to perform tasks quickly. But these shortcuts seems not working properly.
In group chat, now you can exit a group, mute or archive chat. Keyboard shortcuts are also there but not working for me.
There is no official confirmation from the company. So, I cannot say what are the exact changes. But if you are regular user of Whatsapp for web, you can easily spot the changes.