if you're a gamer, the xperia play is still the best phone for the gaming experience. yes there are newer games out there, and my wife owns the new htc one, but the gaming experience doesn't come no where near the xplay. you just have to find games you haven't played (there's over 450+ optimized games). you could buy the gamepad but it defeats the purpose imo.
asphalt 8 on my z tablet doesn't beat 6 on the xperia play. neither does fifa 14 on any phone beat fifa 12 on the xperia play in terms of the experience. if bigger screens, better pictures for facebook, faster speeds and 4glte is your thing, yes the newer phones are the way to go. in terms of pure gaming, xperia play still rules. star battalion, bruce lee, and now king of fighters 98 , pew pew, mini moto, gun commando, plus a ton of emulations are just games on the xperia play that no stock phone can take. there isn't a new game out there that has made me switch yet.