@philip On top of making FOSS easier to access, I think that we would see much, much more people switch over if they start seeing features that they want/need being added to FOSS software.
#Valve proved this by designing #poton. Once gamers could play the vast majority of their games with not just decent, but more often fantastic performance, suddenly a massive barrier to adopting #linux was broken for a large audience.
At the end of the day, if FOSS is unable to provide what these users need, how can any of us blame them for not wanting to switch? But I do think that FOSS is getting better about becoming more accessible to the average user, and I hope this trend continues.