Emra has a new design. Files and apps open beside the chat, so you can talk to a bot about what is on your screen, and the bot is told what you have open. Pinned apps sit at the top of the sidebar, and Command-K (Ctrl-K on Windows) opens a search that jumps to any bot, chat, app or file.
Chats got the same care: react to any message with an emoji, reply to a specific message, and see a preview for links. Every new chat now starts private to you, on a workspace bot too, and you choose who else can read it: people you name, or the whole workspace.