The other real tangible benefit is $$$ certainly compared to the top end Windows releases, although the snow leopard price is hardly a deal breaker.
Some hours reading the manual, web searching or asking in forums vs (26 8-hours working days) x ($15[The average income in my region]).*
Most people use Windows but have it unlicensed. I am not rich so yeah Linux look dirt cheap to me and I don't even use Linux I use OpenBSD. I definitely think the government should push open source in all areas we would be better off. Right now kids are learning to use Windows XP, Microsoft Office, Coral Draw, Flash and Visual basic 6. I have to remark that they are learning all this stuff in fairly mediocre way. Also don't forget government and public institutions sites that are non standards compliant and flash heavy.
*In my comparison $1 = 10 Pesos. The price of Windows 7 Ultimate is 4,004.17 Pesos in Mexico.