It's not new at all. Tents and inns were present in pre-PS1 FF's as well, and in FFVII, VIII and IX you have to pay to sleep at an inn or tent to regain health. In VII and VIII you just used them to regain health on the field, but no tent animation was shown (as far as I remember). However using a Tent in IX you physically see the tent and day turn to night. After XIII I'm glad to see this make a return, as I didn't like regaining full health after battle. FF is heading back in the right direction*
*depending if you're willing to accept that it's an action RPG