Canonical's contribution is more to the desktop and OS itself than to the kernel. The majority of desktop installations are either Ubuntu or Ubuntu-based, and Ubuntu is quickly becoming the server of choice as well.
Ubuntu is leading GNU/Linux adoption worldwide, which in itself is a huge contribution to the ecosystem, as it gets more programmers interested in various open source projects.
Canonical's contribution is more to the desktop and OS itself than to the kernel. The majority of desktop installations are either Ubuntu or Ubuntu-based, and Ubuntu is quickly becoming the server of choice as well.
Ubuntu is leading GNU/Linux adoption worldwide, which in itself is a huge contribution to the ecosystem, as it gets more programmers interested in various open source projects.