I've been eager to move off of OSX for some years [1], but with this rumored laptop, they'll probably sink their teeth in me for another 3 years.
[1] If anyone knows of a laptop that is portable, that supports 16GB of RAM and works well with Linux, please let me know. Even the newly announced X1 and XPS13 are limited to 8GB (and I assume they get relatively poor battery life on Linux)