Kid_Eternity
Quis custodiet ipsos custodes?
Samsung appear to think it's worthwhile:
"The co-CEO implied that upcoming Samsung Galaxy-branded smartphones will be more powerful and faster by confirming that they would have 64-bit processing capability"
http://www.koreatimes.co.kr/www/news/tech/2013/09/133_142604.html
Indeed although they said it won't be for a while, I think HTC said they're going 64bit too. It's a big shift for mobile, and has some pretty interesting implications for the future of mobile computing too. Trivial this ain't.