Its not like the wireless cameras are eating up bandwidth or batteries anyway.
It depends on the use case. If you hook up your cameras to NVR, then yes, they will always consume bandwidth. I am not sure if you even can do that with wireless cameras to be honest.
I would not go that far and say that wireless is winning. It depends on a person and their tolerance to potential issues. Ethernet is definitely better but if it is worth the cost depends on personal preferences.
The bandwidth on 4x1080p camera running 24/7 is still nothing in the scheme of overall traffic in your home. But you are right, wireless doesn't transmit 24/7 because it doesn't need to. Its home security, not China. You capture motion events, which is what you actually care about.
I've had both. Wired 24/7 gave me zero benefit over my current motion detected wireless set up. I went wired way back when then because wirless wasnt as prevalent (or cheap). I originally was going to go for wired again (because its what i knew), but i will never go down that path again. Wireless for standard home security is king and these days is just cheaper for a comparable system. There are cheap wired set ups like swann for really cheap, but these are a joke really.
One of the major benefits of wirelss systems is that they are not impacted by power outage (battery and some onboard storage). SO in the event you are robbed and senone cuts your power, the cameras will still capture the events and the cameras themselves are tamper proof with anti theft alarms on each unit. Standard and even mid range wired systems cant do any of that unless you are shelling out for an expensive UPS to cover the power loss scenario. and even then a UPS doesn thave the staying power of some of the motion activated cameras which literally run an entire year on a single charge. You wont find a UPS that does that.
When you want to review footage on the 24/7 record, you still search the events to narrow down what you are looking for. In effect you have all this junk footage that you never do anything with. Whats the purpose of having an NVR running 27/4 cameras recording 24/7 and terabites of diskspace capturing and recapturing nothing for 23.5hrs a day?
while not overly significant in terms of power draw (~40w per hr for a decent NVR)
E(kWh)= P(w)*t(hr)/1000 = ~1kWh per day. Current power prices of around 25-28c p/kWh means youre paying almost $100 bucks a year for recording data you never use. Kind of seems like a waste.
Wireless is winning. Wirless headphones, charging, fridges, dishwashers, washing machines, phones, wireless connectivity to the internet on any device you can imagine. wifi 6 and 7 and 5g literally blowing use cases for wired out of the water (my 5 g phone downloads at rates faster than my home 250Mbit connection). There will be a time where wired wont even be an option for consumer grade gear any more. You may not think so, but people never thought they'd be carrying the internet in tehir pocket, or that phones would ever do away with a headphone jack. This looks like winning to me.