Is there a point to purchasing handheld consoles anymore?

With the rise of IOS and android games, what incentive do I have to purchase a handheld with expensive games when I can simply whip out my IPhone or Kindle Fire? I guess one could make the arguments that the games are better for portable consoles, but it seems to me that that’s changing quickly. With our everyday devices becoming more powerful every year, the gap in processing power for games is rapidly shrinking. The Verge even did a story a few days ago about how the game ‘XCOM: Enemy Unknown’ has mostly reached console parity. And things are only going to get better from here.

Am I being premature in suggesting the handheld consoles are a thing in the past?