To win chat, Facebook Messenger must be as accessible as SMS, yet more entertaining than Snapchat. Today, Messenger pushes on both fronts with a series of announcements at Facebook’s F8 conference, including that it will launch Mac and PC desktop apps, a faster and smaller mobile app, simultaneous video co-watching and a revamped Friends tab, where friends can use an emoji to tell you what they’re up to or down for. Facebook is also beefing up its tools for the 40 million active businesses and 300,000 businesses on Messenger, up from 200,000 businesses a year ago. Merchants will be able to let users book appointments at salons and masseuses, collect information with new lead generation chatbot templates and provide customer service to verified customers through authenticated m.me links. Facebook hopes this will boost the app beyond the 20 billion messages sent between people and businesses each month, which is up 10X from December 2017. “We believe you can build practically any uti...