My ideal developer laptop
I think the project is great, in that Dell are addressing developers. However, the direction is misconceived.
I don't need help with installing the tools I need to develop software. Those tools - including the OS - are a moving target, and for different projects, I need different versions of the tools. These days I and most of my colleagues do most of our work inside virtual machines for just this reason. The idea that you can predict a set of tools - let alone versions - for a project - is just wrong.
What I need is a machine on which I can install Ubuntu and which can run virtual machines comfortably. I say "...on which I can install...": it's really not good enough for the OS to come preinstalled, because I will need to upgrade sooner rather than later. On that day, I'm going to want to be using entirely open source drivers, both for cost, ease of upgrade, and confidence that the drivers will have been updated.
So: forget about github and toolsets and all that. Forget about a beautiful supplied-by-Dell OS install. Just build some powerful hardware that runs vanilla Ubuntu perfectly on opensource drivers.