They've got some great ideas and insight here. The thing is, there already is a wonderful two-dimensional, general-purpose, interactive terminal/graphic interfa

They've got some great ideas and insight here. The thing is, there already is a wonderful two-dimensional, general-purpose, interactive terminal/graphic interface: it's Emacs. And it really is awesome! I think this is a corollary to Greenspun's Tenth Rule ('Any sufficiently complicated C or Fortran program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Common Lisp'): any sufficiently powerful UI will be an ad-hoc, inextensible, inconsistent, weaker version of Emacs.