Sorry if I'm misunderstanding your reply due to its brevity, but again, error correction is the primary concern of these barcodes, and given that they are good error correctors, you can put what data you want within them, be it an underlying visual programming language or text.

If by "yet" you mean your proposal is to expand on these visual languages by making a programming language + error correction system, you're not adding any value that didn't exist before, it is the same thing as what already exists.

And besides, it's better to just give the user a URI and then they can download the application from a more robust location.