Large corporations have no plans to move to the cloud anytime soon. They would loose a lot of big customers forcing 365 down their throats. So much wasted bandwith for them to use Cloud Services. Not to mention pricey. Unfortunately, the voice of the SBS community is small compared to these guys.
I'm sure they added some advanced functions that 1% of users would actually use ha. Maybe some new formatting styles here and there as well.
I'm not a fan of the Metro interface on Server 2013 Essentials. It's good if all you do is use the basic functions of Essentials. I like to tweak things so I'm not a fan.