Yep, like Google Now, Siri, Cortana. Does Linux possess one of the PA thing.
After some search, I found Sirius: http://sirius.clarity-lab.org/
Don’t know if it is great or worth it. But does anyone have an experience with this?
Sirius is being rebranded as Lucida.
I’ve installed the Sirius suite and it has a way to go before being as well integrated as the other PAs you mentioned. By this I mean, it’s all command line interaction from what I can gather.