We are gathering ideas for floor plans - Still at the beginning

Our Christmas decorations have LEDs. No plug needed anymore.

I don't think anyone will top that.

The window sockets also sound practical, then it's not full of extension cords everywhere (Christmas decorations). If my wife hears about it, she will definitely want it ^^.

I'm very happy about your numerous ideas!

I don't think so at all... I had that done everywhere as well. In addition, a timer or a remote socket is then plugged in and suddenly the window can't be opened without causing damage. I first had to strongly train all women and children to be careful about it... I would have preferred to have them near the jamb. Somehow I find it dumb that way.

Our Christmas decoration has LED. No plug needed anymore.

You mean, with battery

Additionally, a timer switch or a radio socket is then wired in, and suddenly the window can no longer be opened without causing property damage

With a bus system, at least the radio socket and blocking window problem should not occur. However, my wife could not warm up to the idea of a socket in the window reveal at all. She said roughly what Alex85 wrote above, namely that nowadays decorations mostly have LEDs and batteries anyway. I also don't necessarily find the sockets in the reveal a looker. It pleased me though, leaving more sockets for me (elsewhere). But I also don't come close to the 64 sockets in one room, that's quite something. I think we have about 64 sockets for the entire ground floor—and I did not have the impression of being sparing. Although I'm really not happy with the solution in the living room. Those 6-8 fold sockets plus double LAN and double SAT sockets in the area of the TV lowboard are really borderline, but it can't be helped, the technology needs it—and I certainly won’t have power strips inside/on/under the lowboard, especially if it’s a hanging lowboard. The socket cluster still isn’t pretty though. How many sockets do you actually have around the TV? And how do you solve that? All next to each other or two-row?

Is it really that far-fetched to put a power strip inside the lowboard and connect the devices contained therein to it? It's not as if such a strip has to lie around on the floor.

The window sockets also sound practical

A good idea, but I only saw it after the plaster was already on the walls...
For me, it was important to have HDMI/power for the projector on the ceiling, a retractable screen, speaker sockets in the walls, and many LAN sockets. We ended up with 120 power outlets, it shouldn't be less than that.
And then the "MUSTS," which are almost standard by now: a controlled residential ventilation system with heat and moisture recovery, efficient heating – underfloor heating, rain shower, sauna in the bathroom, many large skylights, a fireplace for cozy winter hours... etc.
One MUST that unfortunately we couldn’t afford in the end was the photovoltaic system.