And it won’t ever be true until you can pick up a PC running Linux in a big box store. I could see the Steam Deck (and Valve’s rumoured upcoming console) to make a dent in the PC gaming space, but it won’t make a difference to the purchasing decisions of your your aunt who uses her pc to check her emails.
Should corporate buyers ever get tired of MS’ shenanigans they might switch over to Ubuntu, but I’m not holding my breath for that.