well specs wise, the htc one is built to last for the next 2-3 years so its not like the htc one will start being laggy and crap compared to another phone that comes out this year or next year. you'll be in good hands with the One even in december
htc one, s4, and moto x are the flagship phones out right now. the phones that are coming out this year are the iphone 5s, LG G2, nexus 5 and the Note 3.