I have a feeling that the 3rd runway might happen, however it will definitely be a long battle. If you think about it CX has quite a strong argument, they've ordered 96+ new aircrafts and a new cargo terminal is being made, they're pretty much promoting HK in all its' glory, a 5 star airline and just awarded no.1 in cargo through out the world. KA was Best Regional Airline in 2010.
If the 3rd runway isn't going to be made; flight slots would be very tight and limited, this would stop CXs' and KAs' growth in the future and their image as well

If CXs' argument isn't enough, I have a feeling that HX would also speak out; they've ordered a large amount of aircrafts as well (30 A320s, 16 A330-200s, 15 A350s, 30 B787-9) if slots are limited where would the undelievered aircraft go.

If CXs and HXs ordered aircraft are added together it would give an amount of 187; adding that amount to their current fleets and other airlines flying to HK from around the world, HKIA would just burst and go over the limit if the 3rd runway isn't built.

Also Slosar quoted that there might more new orders to come, can we expect the A380 or more 777-300ERs (Please order the A380, lol sorry I'm currently in my own world)

LOL that is so true. Our only hope is for Boris Island and we know that would never happen. LMAO