The main differences between Ultimate and Home Premium are:
- Ability to change between different UI (display) languages. Useful for multinational environments where each user can select his own localized UI, and for jobs where an easy access to different tech terms is a great help
what's "Ctrl Panel, Device Manager, Sound, video and game controllers" in French?. A bit overpowered for people who purchased their laptop in Japan and want an English interface now buying an English HP version at home might be cheaper
- Bitlocker Drive encryption. Useful for securing valuable enterprise apps and data. Less useful for people who don't want their kids reviewing Dad's photo album (can be achieved easier.
- Better networking than on Professional (Direct Access, better sync). Useful if needed.
- Booting from VHD. Might be a technique for the cloudy future, limited scenarios at the moment.
- Most importantly, Ultimate is more expensive than Home Premium.
The old differences (with Windows Vista) between "Home" (including media features), "Business" (more networking, no media features) and "Ultimate" (has it all, plus "Ultimate Extras") are gone with Windows 7.
If you are running windows 7 home premium and if you would like to upgrade to windows 7 Ultimate. Here is how it can be easy, just choose Anytime Upgrade.
Anytime Upgrade is very easy, find out why from the link(s) below.
