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.
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.