Re: Ubuntu 13.04 and "Rolling Development"
All distributions are potentially 'rolling' to some extent because updates (mostly security related) are frequently offered (but you don't have to accept them). Even Windows is rolling in this sense.
Many distributions have an aiming point for a multi-package bundle of development, the 'next release', and this serves as a start point for new users. It is also a major update for existing users, which can be done either by re-installing or by using the usual update mechanism on a large scale.
Some, like ArchLinux, have more package-focused, smaller, development bundles, and also release 'snapshots', to allow for efficient start points.
Having used both, on and off, for quite a while, on both VM and real hardware, I think I prefer the smaller-scale Arch approach; in practice it has been very stable for me, even through the systemd shake-up.
Windows is cheap, but linux is free