Under perfect market assumption, governement intervation may be wrong. But the laptop market is very different from the theoretical perfect market model.
And the cellphone market is worse yet, much, much worse. At least here in the US, I can't speak for how it works in South Korea.
A regulation like this in the US would just be a bandaid (one I'd welcome) on the much, much larger problem of spectrum use/abuse resulting in few enough players to allow massive price fixing and few real consumer options.
There isn't a violin in the world small enough for me to play when the government issues regulations to protect consumers against the horrible actions of cellphone carriers (and by extension the cellphone vendors that serve them), ISPs, cable companies, etc. They are all fucking horrible and lobby incessantly for government protection when it benefits their lockin and then cry like some little bitch koalas[1] who fell out of a tree when the shoe is on the other foot.
http://en.wikipedia.org/wiki/Perfect_market