In wall speakers

I am designing a system for a client that requested in wall speakers for a particular application. My bias is obviously towards more conventional models, but to be fair, I am a novice in this area. Has the technology improved in the last decade?

Why not post the application, home theater, background music, serious listening, how many locations, etc.
An excellent speaker designer, Philip Clements at (yes, two letters "s") 1-602-437-4445
can go over using the Solus Architectural Series in-wall speakers.
"Diamond Reference Series", especially DR-ir8 Ribbon in-wall with 8" woofer is evolved from the older floor-stander Clements RT-7 which has occupied its place of honor in my main system almost a quarter century.
The website is not evolved, just the great products.