Minecraft Xbox 360 update 1.7.3 is one of the more "throwaway" updates - a homely asteroid wincing in the glare of Minecraft Xbox 360 update 1.8.2. So it's saying something about the game's ever-accumulating complexity that we literally cannot get our heads around what we're now, post-download, capable of.
Besides that coveted Autosave, the update adds shears with which to easily harvest vegetation blocks, and pistons which push blocks around when they're connected to a Redstone circuit. Sounds pretty bare-bones, alongside Strongholds, golems and NPC villages, doesn't it? Right. Now watch the video below.
Stunning, no? And that's just one of the ways you can use pistons in Minecraft, providing you're canny and/or patient enough (those lacking in patience may wish to wait for the aforesaid Minecraft update 1.8.2, which introduces Creative Mode and infinite blocks). Here are a few of the possibilities, unearthed and videoed many moons ago by PC Minecrafters.
Update: just to re-emphasise, this is not a collection of Minecraft Xbox 360 videos, but a list of PC videos that show what's possible when building with pistons.