The Prince and the Princess are on Official Visit AND economic visit. They have with them a lot of belgian scientic people, businessmen and others. For these people this visit with the King's son is really very important.
Is is also very important for Belgium to be known in all these countries.
What Mathilde is wearing is important too and she has for this Visits an unlimited budget providing of the Foreign Affairs.
Prince Philippe is doing what his Father did so well during so many years as Prince de Liege. The then Princess of Liege was not always with him on his economical visits, because never a Princess showed so well what was doing was boring...
During the speeches she looked at the sky or birds or the ceilings.
Now she likes a lot to be Queen , Since Albert II is King a lot of things changes in their private life.