I think this is a real thing and I think a combination of MS demanding everyone get new hardware and Valve really polishing a lot of linux has gone a long way to get non-technical users to start seriously considering linux.
It's a huge added bonus that old hardware simply flies with linux. I have a 5 year old laptop that feels about 10x more responsive since I killed the windows install and put linux on it.
And I know that laptop will continue to fly because, unlike windows, it's never going to get any sort of serious bloatware added on as I update it.