A few weeks ago, Ableton announced Live 9.1 which would finally bring dual monitor support, improved exporting, a melodic step sequencer to Push and a long list of other changes and bug fixes. The beta is out now and can be downloaded by users of any Live 9 version after signing up to the Ableton Beta Program.

See the new melodic step sequencer in action:

Have a look at the 9.1b13 Release Notes (Initial public beta release for Live 9.1)