Personally i think there is a huge innovationspace for pipe connected agents doing work for the user.. a example:

A firefox agent downloading pictures of cats.. piping them to a graphics program drawing mustaches on them piping them to a moviemaker piping them to a firefox video uploading "the longest catswithmustaches" shorts compilation ever.. all clicked together in a "incredibble machine" like explorer by a user who doesent even know how to code..

But you can do that already with bash pipes. Doing it through the GUI just adds mega complexity