We keep looking at RVs but nowhere to park it. We'll get one eventually... (Actually I REALLY want an old Airstream, but am not prepared to settle. I found a website where within, oo, three days drive in most directions I could have had my pick, but sadly there always seems to be something else to do with the imaginary umpteen thousand dollars... Sigh)
Dd2 has played computer games for a long time. We started with a v tech smile
(the orange and purple one) It actually started out because we were caught in a bit of a wheelchair conundrum (bear with me...) - physio assessment showed dd2 was unlikely to be able to self-propel a wheelchair, as she had a lot of retained reflexes etc that meant if she used her arms, her head went down, so she could either self propel, OR look where she was going (not great for the safety of herself or passers by lol).
Anyhoo - the v tech smile was a reasonably inexpensive option to see if she would ever be able to manipulate a joystick/ controls, which could later be used for powered chair. To be honest, it was all a bit of disaster to start with, but she gradually caught on and her ability to manipulate the controls improved. The good thing about the smile was that you could switch the controllers from left handed to right handed play really easily, so it was ace for physio 
We finally caved and bought a wii a few years ago, and she adores Mario, and this Christmas ds1 (14) finally got an xbox, so she is learning how to kill people as well. Which is nice.
I would probably agree that using controllers builds new neural pathways, but tbh so does blooming everything. No idea about the link to walking! I have pretty much tried to give that kid as many different experiences as possible, and to try and get her to try everything possible - none of it is wasted, it's all contributing to development in some way.
We also knew from about 4 or 5 that she would ultimately be a keyboard user in school, so familiarity with devices, consoles and keyboards of all types has been important.
I should add that we were literally the least techy family in the world until it became apparent that we could use it for advantage lol.