During the live letter, Yoshi-P talked about a potential change for the upcoming patch cycle (past 7.1), wherein players could upgrade their house interior to that of a larger house (the example he used was a small house with a large house interior.
I'm pretty stoked for this, as it's something I've suggested a few times. Also, I hope it applies to apartments as well, because people who can't get houses deserve nice things too!
Anyone else looking forward to this?