They could make a Remote Phosphor RGB Laser projector in similar way that LED projectors are made.
3x Blue Laser (maybe in a separate box) feeding laser via fiberoptics to the same type of light box used for LED projectors where the Red+Green+Blue Phosphorous would be.
LED projectors have big cooling requirements (water cooling) to keep the LEDs within a certain temperature range to be able display correct colors.
By substituting remote Laser for the LED some of the heat problems would be removed. The phosphorous could be mounted in a heatsink at the light box to keep it cool.
In case of deteriorating Phosphorus, a solid phosphorus plate could be easily swappable.
The Laser could be stronger than what is possible today with Phosphorous coated Blue LED when the direct heat problem of Phosphorus is removed.
Here are some pictures from a One Chip DLP LED lightbox, just so we can see what it looks like.
Will not have all the advantages of a true Laser Lightengine.
Christie has been showing their Cinema Laser DLP projector several times lately. But it still has Speckle problems. They use several methods to reduce Speckle, one which is to vibrate the screen, which isn't really a usable solution, particularly for HT use.
Maybe they should try to vibrate the DLP DMD in stead using the type of motors used in lenses and also in cameras to vibrate the sensor.