This is something that should be implemented by Google. Hopefully it will be set up so that when apps automatically restore from the play store...your app data will be restored as well. Otherwise...rooting is needed to to backup all apps and data.
Myself: HTC Droid DNA, Motorola Droid Razr M, Nexus 7 (2013), multiple Google TVs
Wife and Kids: Motorola Moto X, Apple iPad 4th Gen, HTC Droid DNA, Nexus 7 (2013), Galaxy Player 4.0,
Retired: Galaxy Nexus, Thunderbolt, Droid Pro, Fascinate, Motorola Droid 1, 3 & 4, Transformer TF101, Galaxy Tab (7" WiFi), Archos 70