Really short today.
Google is updating AR for Google maps app. It looks pretty cool, and weak compared to what we expect now.
Team Fortress 2 is getting a giant update.
https://www.teamfortress.com/post.php?id=189493
New AI that lets you build 3D scenes from single image. This time it's outdoors.
Given that Valve has mention the update is a "as-yet-unnamed, un-themed, but still very exciting summer-situated... update", I doubt it's going to be the "Heavy Update". That and them not talking about weapons means I expect something bigger than a Smissmas/Scream Fortress but below a mainline update.