Wait a minute what about Nexus 5? Report suggests that currently company has now plans about supporting the newly launched Nexus 5 smartphone. Now you must be thinking why the company has dropped the support for some Nexus devices.
Alexander Sack explains this on ubuntu-phone team mailing list. The officials behind the project want and need to narrow their focus so that they can emphasis on the upcoming 14.04 version of Ubuntu.
Don't worry if you have the Ubuntu Touch installed on your Nexus device, it won't stop working.