Yeahhh but I hate gaming on a mouse these days. I actually had a game I liked back when I bought the laptop. For the life of me, I can’t remember what it was. I earn decent money so gaming laptops/consoles don’t really come close to denting the budget.
Then... just use a controller? Most PC games of the last decade work perfectly fine with Xbox controllers (wired or wireless), PS4 controllers or any other bluetooth controller or USB controller.
But if he wanted to play something like Overwatch for example, playing it on a laptop with a 1070 just for the sake of it being a laptop... then using a controller he would be putting himself into a pool of other gamers all using M/KB for no real reason.
Some people like to game on what they like to game on, as for OP have you ever considered picking up a Switch or two for you and the wife? really snug little travel system if you enjoy Nintendo games and don't mind paying a little extra for third party games which look slightly worse than on X1/PS4 just a thought for consideration, maybe just bag up the X1 and enjoy the rest of your trip in France and worry about it when you get home :) Happy and safe travels.