I mean if you just bought a Macbook Pro yesterday, probably not. But there are still significant improvements over the current chips. Especially if it adds USB type C, and thunderbolt 3. That port is the future, so it's important to have a laptop with it.
But for me, I have a 2012 retina MBP. So I'm getting significantly more storage, significantly faster SSD, the capability of driving 5k monitors, thunderbolt 3 and USB type C (probably), better battery life, force touch, faster processing, better graphics, better RAM, etc. So yes, it's a huge deal for me.