Not really. It's just an evolution of the MacBook Pro line, like from Unibody -> Retina styling. Each iteration will get thinner and lighter but hopefully still have more battery life.
The Air is known for it's taper, the MacBook Pro will unlikely ever have that because it robs it of precious battery life space. I'm merely saying that fewer ports means a smaller motherboard, and a smaller motherboard means more space for battery (or packed or compactly), so the system can get thinner.
Regardless, the transistor substrate for the display is the real power drain here. They need to move onto updated technologies.
I don't think you understand what the MacBook Pro is then, who its aimed at, what market it's based in. Its not made to be sold in a market that's ruled by thin and light designs above all else.
And its why I don't think, hope, it will ever get much thinner because it needs all those ports. Plus it needs the cooling abilities it does have for the powerful CPU and GPU we want them to have.