The installation takes about 30 minutes to complete for both Hyper-V and physical environment. Overall, it is running smooth with 1GB RAM in both environment with and there were no issues so far.
The Windows 8 Developer Preview ISO is available for download at http://msdn.microsoft.com/en-us/windows/apps/br229516
Boot from Windows 8 installation disc on a physical computer or boot from ISO image from VM
Select Install now to proceed
Select preferred Language to install, Time and currency format and Keyboard or input method and click Next
"Setup is starting ..."
Check "I accept the license term" and click Next
Select Custom (advanced)
Select the available space and click Next to proceed
Installation begin ...
Click on Restart now to restart Windows
After Windows restart, Setup will update registry settings
Enter a PC name
You may select Customize settings or in this case, I selected Use express settings
Enter username and password
Windows Finalizing your settings
Logon successful with credential created earlier
Metro look and feel on Windows 8!