What is one of the biggest opportunities for solution providers in the UC space right now where they can make the most profit?

There's growth in hosted and UC as a service. SMBs increasingly look to third parties to deliver managed services. Providing UC&C services on a hosted basis is a good option for solution providers looking to leverage cloud data centers and [points of presence] to sell a service required by businesses of all sizes.  

The key to success is the ability to detect and respond to issues in real time by embedding built-in diagnostic elements capable of zooming in on a UC&C application sub-type which is underperforming;- it could be UC video, voice, or app sharing and to evaluate each separately to solve performance issues.