What kind of equipment do they use? Where and on which aircraft do they offer such a service? I remember Thai used to have a starboard facing galley immediately behind the business section. It was about 10 coach rows long.
Of course it's a good idea. Many airlines proudly boasts of their inflight chefs on board. And these are real chefs with the proper certification, but still have to undergo the usual flight attendant procedures.
It's a plus for people who travel on them. And an incentive to fly on them instead of rival EMIRATES.
Other airlines that either once used or are using onboard chefs include LAUDA AIR (still do), ANSETT INTERNATION (now defunct).