I've also linked some useful sites that contain some more indepth discussions.
General Windows Changes
- Native NIC Teaming
- SMB 3.0
- Ability to switch between Server Core and Full UI
- Multi Server Management from Server Manager
- Metro interface (present, but not in your face at boot)
- Storage Spaces
- Everything doable in the UI can be done with PowerShell
Infrastructure Changes
- Domain Controller Replication (Clone & Deploy a DC)
- Virtual Domain Controller Support
- Storage across Remote SMB 3.0 File Shares (SQL & VM's run from file shares)
- IP Address Management
- Dynamic Access Control (File & Folder permissions on steriods!)
- RemoteFX without a hardware GPU
- RemoteFX in RDS Sessions, not just VDI
Hyper-V Changes
- Shared Nothing Live Migration
- Live Storage Migration
- Multiple Concurrent Live Migrations
- Hyper-V Replica
- Extensible Virtual Switch
- SR-IOV
- Network Virtualisation (servers running on the same IP without conflict)
Hyper-V Scalability Changes
- 160 Logical Processors per Host
- 2Tb RAM per Host
- 32 vCPUs per VM
- 512Gb per VM
- 16Tb VHDx
- 63 Nodes per Cluster
- 4,000 VMs per Cluster
Hyper-V 3.0 versus vSphere 5
While comparing an unreleased product to a released product isn't exactly fair, I thought I'd include it for completeness sake. Also it's the most common question that customers ask me.
This article has a fairly clear comparison table:
http://up2v.nl/2012/01/29/microsoft-hyper-v-3-0-compared-to-vmware-vsphere-5/
Information Links
http://www.aidanfinn.com/ - Massive resource for Hyper-V
http://workinghardinit.wordpress.com/ - Another huge Hyper-V resource
http://blogs.technet.com/b/server-cloud/archive/2011/10/11/windows-server-8-hyper-v-overview.aspx
http://www.microsoft.com/en-us/server-cloud/
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