Migrating to php 7

Is there any roadmap for migrating to php 7?

If I just install v7 versions of the php modules I already have installed, is there any chance of things working as before?
Well I've just deleted all the php56 modules which were installed, and replaced them with php70 modules and Drupal manages to come up. I'm a little surprised that there hasn't been any problem so far.
It boils down to the application being compatible with new PHP version. CMS systems such as Wordpress and Drupal, when updated to a latest release, are usually compatible with latest PHP versions.