Most of 2048's fanbase enjoys it because it makes them feel smart. It gives them an adrenaline rush as they tap buttons or swipe the screen, watching the numbers combine and become higher and higher. Some say that playing 2048 makes them "feel like a computer", and that Threes does not.

If pushing buttons quickly and watching numbers fly everywhere /and somehow not cause you to lose/ makes you feel like a computer, then Threes absolutely does not make you feel like a computer. You can get pretty far in 2048 just by rapidly pressing two buttons and then adjusting when the board gets messy. That is the entirety of 2048's strategy. I've been playing Threes since its release three months ago, and I still find that my scores are improving as I notice new strategies. Threes has infinitely more depth than 2048, which is what keeps me coming back for more.

The only reasons 2048 is more popular than Threes is that a) it's free, while Threes costs $2, and b) it is EXTREMELY friendly to newcomers. It's absurdly easy to get a 2048, while it actually takes thought to score high in Threes.

So yes, if you're looking for a mindless free time-waster, 2048 is the game for you. If you're looking for a deeper, more polished puzzle game, Threes is superior in every way.