Is Ubuntu Touch is able to recognize voice commands?
What kind of speech recognition is built in and is it usable in Ubuntu desktops?
We built the voice feature around two different Open Source voice engines: Pocket Sphinx and Julius. While we started with Pocket Sphinx we weren't entirely happy with it's performance, and found Julius to start faster and provide better results. Unfortunately Julius is licensed with the 4-clause BSD license, putting it in multiverse and making it so that we can't link to it in the Ubuntu archive version of HUD. We're looking at ways to make it so that people who do want to install it from multiverse can easily use Julius, but what we'd really like is to make the Pocket Sphinx support really great. It's something we'd love help with. We're not voice experts, but some of you might be, let's make the distributable free software solution the best solution.
CMU Sphinx is an open-source project that can also be used on the Desktop, Julius too.
On the long term Ubuntu Touch and Ubuntu for Desktop will be the same OS, so the answer to question like "can it be used on Desktop too ?" should hopefully be more and more positive.