Security is not the main motivation for this project. Not being an expert, I assume that anything built should be inherently secure. Security is not a feature, it is an essential component of the underlining project.
Building a secure application is complexe yet it should be virtually invisible to the user. On the end user point of view, things just work.
I did give the parsing the web as an example, but that's just one aspect of things. Yes it is very complicated and it might require a few years to optimize it to a useful tool. At the end of the day, it is not impossible.
I haven;t heard of the bit cloud project before but it seems very interesting Bitcloud Project - fixed the link. It also contributes to the idea of your PC being yours again.