The next change of interest is the option to include malware protection. This adds an extra layer of security which might come as a welcomed feature to most of us.
Not much else has changed apart from the visual experience but I couldn't help but notice the small but apparent logo in bottom left of the installation window which indicates a closer relationship with the Office team at Microsoft.
One should also note that Windows Server 2012 with Exchange Server 2013 demands more resources than previous versions. This is true in the current build but might change when the products goes gold. Still, don't expect these machines to start with anything less than 4GB of memory for each server and plenty of IOPS to spare in your storage solution. My lab consisting of a laptop with 6GB of memory and a single 5400 rpm disk simply couldn't hack it but your mileage may vary.