While we are eagerly waiting for Gabe Aul to push that Red button for Windows 10 Mobile Build 10549.4, we can already watch Build 10567.1004 in hands-on action video. A video has been posted in WindowsMania.PL forums and it does show that Build 10567.1oo4 is pretty fast and stable.
While not many changes are visible, it seems the Phablet kind of multitasking UI will make its way to devices like Lumia 920 too. One can also note five quick-action buttons available only on Phablets like Lumia 640 XL yet. So seems with this build we will see more Phablet features trickling down to devices with display size of less than 5-inch.