I´m not that excited because for me Buffy was a one of a kind show. Yes...the reboot is done by its original creator, but that doesn´t nessecarily mean that he can do "the magic" again. It´s difficult to repeat a "miracle". Does he still have that..."spark"...that made Buffy a success? We will see.
This new Buffy doesn't have to "equal or surpass" the original, though; it just has to succeed based on its own merits.