Yeah yeah, don't feel bad. Kids today wear Metallica, ACDC, and Nirvana t-shirts but have no freaking clue who they were besides cool bands before they were born.
Good on them for choosing PC in any case, but if they want to really appreciate better performance, let them buy all the parts themselves for upgrading. It will teach them the value of money and how far it goes. Then they might start seeing how the old man had a point