Mark Shuttleworths words:

"Yes, we are talking about Ubuntu 13.04, dubbed Raring Ringtail and scheduled for release next year on April 25th.

Some of you will be thrilled to learn that Ubuntu 13.04 will be built especially for mobile hardware, from netbooks and laptops, to tablets, TVs and smartphones.

Therefore, it looks like Ubuntu 13.04 promises better battery life, better memory management, better management of running processes."

The release schedule for Ubuntu 13.04:

December 6th, 2012 – Alpha 1
February 7th, 2013 – Alpha 2
March 7th, 2013 – Beta
April 18th, 2013 – Release Candidate
April 25th, 2013 – Final release