The problem there is that Google will likely release an updated Chromebook Pixel soon, also.
With coreboot enabling installation of Linux on the Pixel for developers (And stock ChromeOS for regular users, of course), there is no reason to prefer MBP over the Pixel.
Requiring apple hardware to develop for ios is a pretty big reason to prefer mbp over pixel. Even if you aren't an ios developer, a development shop that does mobile will most likely deploy macs to their developers.
Similarly, if you develop cross-platform, having a MacBook Pro that can do Windows, Mac, iOS, Android & Linux development all from one device is really compelling.
With coreboot enabling installation of Linux on the Pixel for developers (And stock ChromeOS for regular users, of course), there is no reason to prefer MBP over the Pixel.