No, I don't think they will ever lose the portable gaming interest. Nintendo has been doing a great job, creating valuable IP (Intellectual Properties) that can continue throughout the portable gaming systems. Franchises like Mario Kart, The Legend of Zelda, Animal Crossing, Fire Emblem, Pokemon, Super Mario, Donkey Kong, Yoshi, will always be able to capture consumers' attention because the're are always improving. Nintendo's hardware in portable gaming are never the greatest, but the software (games) that Nintendo offer is amazing, the wide gaming library is something everyone can benefit from. The 3DS had a bad start because of the lack of games, but now because of it's gaming library everyone favors it over the PS Vita. Nintendo will never lose the heart of portable gamers such as myself.