Just to share my experience on creating Windows 8 pool using the new Horizon View 5.2:
I created a Windows 8 VM with VMware Tools and View Agent 5.2 installed, with most of the optimization steps applied that is similar to Windows 7. The optimization script for Windows 7 in the white paper works save for the few services that aren't present in Windows 8. After configuring a linked-clone dedicated pool with default settings, I let the desktops created and logged in to the pool. The AD environment on the lab was at the 2008 R2 level for domain and forest functionality.
Surprisingly, none of the modern UI apps showed up save for IE and Windows store! And trying to open them cause it to exit immediately. The Application event log indicated that the app didn't launch in an allotted time. Not a very helpful message.
I tried joining in on an OU that has no group policy applied (e.g. inheritance blocked), but modern UI apps still didn't work.
I've been browsing all the Microsoft's social forums to see why the modern UI apps fail to work when joined to the domain - there's a fair amount of threads active with people who are having issues with it. However, none of them really gave a clear answer except one: someone deployed it using Windows Deployment Services (WDS), which indicated to me that it uses sysprep for customization, and the metro UI apps worked without any problems while on the domain.
Taking that as a cue, I re-created another pool, but using Sysprep this time, using a basic customization profile. This time, it worked without a hitch! This made me wonder if modern UI apps depend on the local SID or anything that Quickprep doesn't touch.
So if anyone's interested in trying out Windows 8 under 2008 R2 AD environment (not sure about the 2012 AD), I would say use Sysprep customization for now. BTW here's someone from Microsoft forums detailing his experience with 2012 AD:
I did testing with Windows Server 2012 Standard. The App Store is disabled by design. You also cannot personalize (say your login photo), and that is also be design. I had an early test where I upgraded Windows 2008 R2 to Windows Server 2012 and I had full access to the App Store, however I was unable to repeat. MS must have closed the process that allowed the App Store to be installed in an upgrade.
Thanks,
solgaeDK