Buy Asus ZenBook Duo: If you're considering the ZenBook Duo, the real question you need to ask yourself is how much do you really need two screens on a $1,499 ultraportable. ASUS did a decent job of fitting in a second display, but it leads to plenty of compromises. Get More Engadget: • Like us on Facebook: • Follow us on Twitter: • Follow us on Instagram: • Read more: