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The biggest thing from my perspective is that now multiple chassis are required for different types of applications: •    The 8000 Modular Blade System (released in 2006), was optimized for four-processor servers •    The 6000 architecture is targeting smaller, edge types of applications and is optimized for two-processor servers This is good from an environmental perspective, since each system is optimized for different application loads, but now you need a separate chassis for your 2-socket and 4-socket blades.  Why not just have a single form factor for every blade? Having a separate chassis for 2-socket and 4-socket blades limits your scalability and since all blades will be of the same type, this fixes the compute capacity. The only exciting thing that Sun talked about was I/O virtualization as a future product – they only mentioned it in a soft whisper (but they're “not ready to announce it yet!”).  Funny, that is what everyone is talking about these days. Egenera has been innovating around I/O and data center virtualization for 7 years.