Restaurant trends for 2015: Hong Kong professionals give predictions

On-trend, a term once applied more to fashion than food, is now regularly used by culinary critics, the media and restaurateurs.
In Hong Kong, if a restaurant concept is on-trend, if it is now, if it is hip, if it has worked overseas, then the chances of it being successful increase.
This is because diners, including even the most savvy of Hong Kong gourmands, tend to be drawn to the latest "it" restaurants.
This fashionability of new openings plays its own role in the creation of a culinary trend, as do celebrity chef involvement and diner response.
So what is going to be on-trend or trend creating in Hong Kong this year?
Four culinary professionals share their thoughts on key trends of the past year that they feel will carry through this year, identify some news ones, and clearly communicate those they hope remain behind.