The problem is it's already hard to be very precise about what you're saying when talking to a computer just with text, so we'd need functions specific for each

The problem is it's already hard to be very precise about what you're saying when talking to a computer just with text, so we'd need functions specific for each of those voice requests, more reliable voice recognition, and also some AI intelligence to understand the English you're using, so even that simple request would be difficult unless we pre-scripted the functionality for that whole phrase. It's not impossible, the technology just isn't there yet.