As mentioned in a previous post, the B787-10 aircraft has received FAA certification, and is due for entry into service, with Singapore Airlines as the launch customer.
Singapore Airlines has 49 B787-10 aircraft on firm order, and will receive its first aircraft in March 2018. The airline will then deploy the B787-10 for its regular service to Osaka on SQ618/SQ619 (provisional) from May 2018. However, it has been reported that the aircraft will be deployed to Kuala Lumpur and Bangkok for crew training before this. As per Mainly Miles :
Singapore Airlines will only have a two-class configuration of 36 Business and 301 Economy class seats on board the B787-10. Business Class will adopt a 1-2-1 configuration with all-aisle access and lie-flat seats, while the layout in Economy Class will adopt a 3-3-3 configuration.
Here is the layout for Business Class on board the B787-10:
This effectively means that Singapore Airlines is working towards an all-aisle access layout in Business Class for both long-haul and regional routes. More details on the regional Business Class product, as well as the subsequent routes to be serviced by the B787-10, will be revealed in due course.