Okay, maybe people can say that shoelaces are obsolete now. Who wants to tie their shoelaces when they have velcro? Or slip-on shoes?
Folding Table sale in my country is dwindling, but yes, there is market for them. As far I see, the target market is children (who can’t reach standard-size table) and boarder (who wants to spend less money). Other than that, folding table also used in colouring and drawing competition because its portability and lack-of-table tendency there.