What does the X4200W not do that you want it to?
It already supports Atmos, DTS:X on the audio side, and HDR10, Dolby Vision and HLG on the 4K HDR side.
For Imax, you'd have to see how much content is available, and if the difference is noticeable for the cost.
If it's room correction, at least one analysis shows data about performance of the system (which may help you decide if the other systems are worth it):
The X4200W also allows for 5.2.4 Atmos setup with an external amplifier. Unless considering going to 7.2.4, adding an amplifier might be more economical than replacing the AVR with a newer one with 9 amplified channels (AVR-X4500H, AVR-X3600H).
If you can't install ceiling speakers, Atmos virtual height functionality could make a difference. You'd have to weigh the cost.
Probably the biggest thing that Denon added over the years was Heos capability and internet streaming apps. There's no inexpensive way to add it to the AVR.
Airplay 2 compatibility is pretty much the same thing. Newer Denon AVRs get Airplay 2 compatibility and it's not easy to add with an external device.
If you don't have any other ecosystem, Play-Fi is very inexpensive to add to any amp or receiver via RCA jacks with the Phorus PR5.
If playing 4K video, the X4200W can't overlay the GUI or info/volume over it.
There's no future-proofing with any current AVRs for 8K video, so you may consider holding out for that.
Originally Posted by aaks38
Ive got a 5 year old denon avr x4200w which ive been happy with overall but have had the itch to upgrade but not sure if any of the current formats are worth upgrading to. The receiver supports atmos and has xt32 cal but ive been reading about the latest gen receivers with Dirac live and Imax processing and atmos height. I cant gauge if these are worth upgrading to or is best to wait for some format thats on the horizon. Thanks for the help.