This is a good rationale if the objective is to only target modern systems and that modern systems are correctly described as having a supported GPU. Unfortunately, I frequently make use of virtual machines these days, or systems where the GPU is not supported well (many modern GPUs, nvidia stuff, older ATIs, intel poulsbo, etc.), so these axioms do not apply to me. Which means that the future of GNOME is not my future, and that's unfortunate.