In all seriousness, emacs is a good example of an environment where "apps" are less siloed and rigid than they are in a typical graphical OS environment. Another is the Unix shell. The idea of creating an environment that achieves the same level of flexibility and empowerment while being modern and graphical and, somehow, accessible to non-programmers… it's not a new idea, but it's a noble one. "Mercury OS" deserves points for at least trying to imagine how it could work, even if there's not much meat on the bone.
