Installing new wires in room with hardwood floors

And would be much cheaper than dedicated floor boxes and protective cover plates.

there are good reasons to utilize floor boxes, but they come at an expense to do it correctly.

Just poke them through. Avoid signal degrading  receptacles. Going cross joist, drill through.

Why not wiremold along the wall with a surface mounted box. There are many types to choose from...

https://www.crutchfield.com/S-XAvKqmCQqbD/p_717CMK50/Wiremold-CordMate-II-Cord-Organizer-CMK50.html?...

Go through the wall down to the basement by drilling through the bottom plate into the void between the floor joists. A flex drill bit will enable you to drill through the electrical box cutout in the drywall.

I have a drop ceiling in my basement that helps hide a lot of wires.  I did drill a small hole in the hardwood floor in the living room above it to run Ethernet wires.  The hole is hidden by some built in shelving in the living room.  It’s been there 7 years now.  I guess I might have worry about it when I move, 

Mahler
i have holes in hardwood floor in one room. Works but not ideal. Thought I could do a floor plate but I guess you have to really cut away at floor wood to house everything.  Not ideal.  
May just pay up and do a wall socket.  All larger rooms with tv music potential need to be wired.  Wireless has its limits.  
Seems nothing magical can be done to solve challenge faced by everyone..