It's also a common installation method for the more "advanced" distros. The "SAG Trifecta" (Slackware/Arch/Gentoo) uses a lot of chrooting in its installation procedures.
What's interesting about takeover.sh, though, is that it goes a step further and causes the chrooted system to actually replace an existing OS without a reboot and (theoretically) without involving additional boot media.
What's interesting about takeover.sh, though, is that it goes a step further and causes the chrooted system to actually replace an existing OS without a reboot and (theoretically) without involving additional boot media.