I heard a news report about future iOS versions/iPhones having a remote power on feature…
I can't find anything online about this.
While I assume this may become a possibility, if Apple is talking about implementing it, Android probably already has the ability.
What does anyone know about this?
Technically not possible if the iOS device is really shut down. Within LAN technologies is the Wake-on-LAN ethernet frame specified to awake a client if hanging on a power strip and network attached.
Before a remote power on will be possible iOS has to be changed that a shut down still stays awake for connectivity like, NFC, BT LE, GSM/LTE or WiFi.
We heard rumors that the Apple Watch 2 with Watch OS 3 later releases will be able to unlock the turned-on but locked iPhone connected to by Bluetooth by using the Watch Screen as Touch ID. But these are just rumors.