Edit: Looking at this picture https://cdn.arstechnica.net/wp-content/uploads/2017/05/surfa... and there's even substantial space around the type A receptacle. I honestly don't understand how it can be thinner than the MBP. I look forwards to seeing one in person.
The smaller MBP is 0.59" thick. The Surface Laptop is 0.57" at the thickest point (0.39" at the thinnest). Either one can easily accommodate any USB port.
If you look at a Macbook Pro sitting on a table, you'll see there's a considerable gap between the table and the side of the computer. That's because the MBP is thicker in the middle than at the sides, which makes it appear thinner than it is.
It becomes a lot easier to see it when you look at this.
I think this (the Mac) is Photoshopped 'deceptively'. Look at how the top of the shell and the base don't have concrete edges but are faded into white, too.
https://www.apple.com/macbook-pro/ - look at most of the photography, not shot side on, so it looks like just the vertical edge of the MBP is the entirety of it's "depth", which is not accurate.