Foldable phones. Samsung has finally unveiled, and officialized its first folding phone - the Galaxy Fold. With a price tag of about 2,000 US dollars, it might not sell like an iPhone. But like the iPhone before it, it could be a game changer, and like the iPhone, it could redefine how we think about mobile phones - or screens.

Many tech giants and experts believe that we will see a decline in present-day smartphones within the next decade. Smartphones will be challenged by a wide range of wearable gadgets and smart systems which provide new, convenient ways to communicate and enjoy the benefits of the digital world.

Cash is still king in many countries, even with the advent of debit and credit cards. But now cash and card payments are facing a challenge from new foes - smartphones and social platforms. With over one-third of the world having access to smartphones, and their high penetration in developed countries, will we still need to carry our wallets around?