When Microsoft debuted its Windows Holographic software and HoloLens headset a few months back, Windows 10 apps were mentioned as a possibility. Well, at Build 2015 today, the folks in Redmond offered a look at Windows 10 Universal apps in holographic action. During the onstage demo, apps could be placed on walls or set to float in space, and resized based on the user's needs -- something we'd only seen in videos up to this point. Of course, this means that users in different locations can collaborate on 3D models without having to be in the same room. Any Windows 10 app can be used as a hologram with the headset, so getting work done at a place other than your desk will soon be a possibility.