At Debconf15 I gave a talk on topic of having backups be a default service on Debian machines. In that talk, I proposed that we create infrastructure to be included in a default Debian install to manage backups.
I still think this is a good idea, but over the past several months, I've had nearly no time at all to actually do this.
I'm afraid I have to say now that I won't be able to work on this in time for the stretch release. I would be very happy for others to do that, however.
The Debian wiki page https://wiki.debian.org/Backup acts as a central point of information for this. If you're interested in working on this, you can just do it.