One of the latest mailing list form the Canonical Ubuntu-phone comes in with a disappointing news, stating the support pull-down of their operating system Ubuntu Touch for Samsung Galaxy Nexus (maguro), Nexus 10 (manta) and 2012 Edition of ASUS manufactured Google Nexus 7 (grouper).
The main reason behind this action was to concentrate more on their upcoming release 14.04 for phones and tablets with Android 4.4 KitKat. Also the software engineering costs for developing their free operating system that mattered.
We also heard that the primary engineering platforms for the coming month will be working on specific emulators based on armhf and x86, that will basically bring the portables and desktops below the similar codes. The support for the latest Google flagship Nexus 5 will be relatively easy once Canonical's people are done with Android's version 4.4 KitKat and meeting up with their financial needs, said Ubuntu's exec, Alexander Sack in the mailing.
Ubuntu Touch from now will only be officially available for LG made Google Nexus 4 (mako) smartphone and ASUS crafted 2013 Edition of Nexus 7 (razor) tablet. But folks loaded with Ubuntu Touch OS on the unsupported devices, you needn't worry, as it is not going to stop working from the moment, you will just not receive the latest updates or bug-fixes.
Source: ubuntu -phone team mailing list archive, Android Central