You realize that building new meat sacks is a much more difficult problem than slinging meat sacks into space? It's like wanting to rewrite an entire operating system from scratch instead of fixing a difficult driver bug (terrible analogy, I know).
Personally, I think that slinging meat sacks into space without breaking them or letting them rot is harder than building a new operating environment.
The meat bit isn't all that useful so we need to get rid of it. In fact it's a pain in the arse.
The thing that is superposed on top of the meat is the important bit, you know like CDs don't really matter but the data (music) does.
Imagine if you had 1000 hands that worked in -50oC to 300oC, another couple Tb of persistent state and a rewire which allowed you to do sequential calculations efficiently (rather than lots of useless parallel ones), oh and you never had to poop.
