I got some Bugsplat screens come up but they didn't bring up a Launchpad window so I'm gonna report it here too.
I tried the Unity 8 session in Ubuntu 16.10 and when I log in I can't move the mouse (maybe this should be filed as a separate bug?), once I hit the keyboard (I used Alt+Tab) I am able to move the mouse but the screen goes black after five seconds and then comes back up after around 2.5 seconds with the scopes and indicator tray visibly reloading. After five seconds, the screen goes black again, comes up after 2.5 seconds, goes black after five seconds... seemingly forever.
I noticed that my fingerprint scanner (this is a Lenovo ThinkPad X201) had its light on so it was wanting to receive a fingerprint. Trying to scan my fingerprint didn't make a difference to the situation. I use fprint from this PPA (https://launchpad.net/~fingerprint/+archive/ubuntu/fprint) to get the scanner to work, I don't think the official repository version of fprint supports my fingerprint reader. I will remove the package and see if this changes the situation and will edit/comment once I've done that.
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: unity8 8.14+16.10.20160922-0ubuntu2
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Oct 13 19:36:47 2016
InstallationDate: Installed on 2016-06-18 (116 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: unity8
UpgradeStatus: Upgraded to yakkety on 2016-10-11 (2 days ago)
Status changed to 'Confirmed' because the bug affects multiple users.