The upcoming Intel 9th generation 'Coffee Lake-S' CPUs will feature a soldered integrated heat spreader instead of a thermal compound. However, this will be limited to only the 8-core Core i9-9900K and the Core i7-9700K while the rest of the lineup will still continue to use a thermal compound.
https://www.notebookcheck.net/No-delidding-needed-Intel-Core-i9-9900K-and-Core-i7-9700K-to-come-with-a-soldered-IHS.318386.0.html