Mein ne ussay bola that in Quran and even so many Ahadiths are about parents, their rights, taking care of them, not to say Uff etc. he said yes you should be good to them. But taking care of them, like be with them, or keep them with you, is not a duty on kids. I told him about my Mamoon who studied and lived in US for almost all of his life. But once he was a bit settled down, he brought his mother to him and kept her with him till her last breath. This guy said, okay good if he did so. But it was not his obligatory duty.
By the way I would like to know how does the folks who lives in US/UK/Canada, or any other far off place, how often do you people see your parents, if they are living in your home country? I am sure it must be difficult to pay visit each year. But dont you see them (either they visit or you visit) even once in two yrs ?