A fully supported version of the HTML5 client is released with vSphere 6.5, and the official name will be vSphere Client.

• This client is designed for managing vCenter.
• The new visual theme is called “Clarity”, and is also still in development. We will be fixing UI bugs and subtly changing the look and feel to fit the new Clarity standard.
• The appliance requirements are recommended settings. It should still work at lower settings, but performance may be impacted.
• The root password on the appliance is ‘demova’ (without quotes). If you enter the wrong password too many times you will get locked out. The easiest way to fix this is to redeploy the appliance from the OVA.