* Microsoft technology since Hyper-V is a Microsoft technology, it is guaranteed to work almost flawlessly with Windows Server 2008 boxes meaning that you should be able to run several stable virtual machines off your physical server using Hyper-V if there are any security holes or bugs found within Hyper-V then you will find that Microsoft will be quick to develop a fix for such holes and bugs which will then be issued via Microsoft Auto-Update allowing you to upgrade all the programs on your system without the need to do so manually
* Compatibility with Windows operating systems Hyper-V will allow you to create multiple virtual machines which use Microsoft operating systems this means that in theory you could have one virtual machine running Windows Server 2003 and another running Windows Vista although to a normal person this may sound like a stupid idea that isnt worth it, as a web or software developer you will know the importance of being able to test your websites and applications on different Microsoft created operating systems before putting them into live use
* Enterprise Linux compability although Hyper-V may not be compatible with a majority of Linux distributions, it can still be used with Suse 10 which will allow you to test any Linux based applications you have within the confinements of the
Hyper-V virtual machine environment although you may feel limited with only being able to use the Suse Linux distribution, you should note that this is one of the best Linux distributions around that should be able to offer you what you need when it comes down to running and testing Linux based application
* Price since Hyper-V is included as standard with Windows Server 2008, it means that you are virtually paying nothing for it except for the cost of the initial operating system license this means that if you are using Virtuozzo or looking into Virtuozzo then you can reduce your running costs by moving over to a solution where you dont have to pay a monthly license fee for the right to use the software this also means that as a Windows license holder you can contact Microsoft for support for the Hyper-V application if you feel that you need it