Bloomberg's @markgurman, who got the scoop on John Ternus's new gig as Apple CEO, explains why he thinks Ternus will do "a hell of a job" in his new role: "He has product sensibilities that Tim Cook simply doesn't have. He has product decision-making ability that Tim Cook certainly has, but wouldn't utilize because he himself knows that product-based decisions are not where he could have the most impact." "Just like Tim Cook really oversaw the operations part of Apple as CEO and left product…