Intel Haswell is said to launch in Q2/Q3 this time.
What's special? There will not be a limit of 2 SATA3 ports anymore. Will this change the hosting game? Will be see RAID cards disappearing and more usage of software RAID in pure SSD setups? In the past, the SATA3 port limit seemed like a major limitation to performance.
On top of that, expect the usual power savings + performance increases.