I don‘t think real sense is related to Sonar. See below the spec of REAL SENSE
Intel® RealSense™ Technology
BTW, ss you said, Sonar is a tech out there for around 20 years already.... it is not something for 2016.
my understanding of the Real Sense is it has a 15 degrees detecting angle and just 3-meter detecting distance meaning that it is not even close to real working circumstance. And I don't think it is decent way for relying on people to upgrade to RealSense while promising without proof that this will offer the same performance demonstrated at CES.