That's the subject of our latest UCStrategies Industry Buzz podcast, and needless to say there were lots of perspectives from the group. If you want to know the latest state of enterprise UC, the Gartner MQ is required reading, and for the most part, there were no surprises.
Needless to say, this is really just one slice of the UC pie - it may be the biggest, but it doesn't really reflect all the disruption that keeps our community busy and gainfully employed. To me, that's where the podcast gets more interesting, and I really hope you give it a listen. It's certainly one of our most popular podcast topics, and you can access it here from the portal.
Aside from my comments on the podcast - at the 11:56 mark - much of this was amplified in my latest UCStrategies post, titled "Tomorrow's UC - Nobody's Talking About Voice", and you might enjoy that as well. And if you do, feel free to share!