I can see the value in that, I don't see how looking across to a browser which has rendered the results of a command piped into a script is the end of the world.
One issue I have with bluring the lines is you open yourself up to a huge attack vector. If I can craft the output of my shell command to get code execution within your terminal I can now do anything, anything on any system you have access to.
Have you read "The Visual Display of Quantitative Information" by Edward Tufte? Text isn't the best representation of all types of data.
Imagine also that I wanted to represent a table of data within an Excel style spreadsheet. This could be useful as it could define affordances for a user such as the ability to select rows and columns, and to sort or filter in realtime.