What Kyle Walker said... Great answer Kyle!
IMAX in general has regular seating no matter the theater. The recliner seats are available for every other format (digital, Dolby Cinema, Read-D 3D, etc.) IMAX refuses to use recliners or heated seats so they don't "take away from the experience", aka more seats = more $$$ for them. If you want comfortable seats, go with the Dolby Digital. It's an overall better experience than IMAX.
Thanks! Your answer is awaiting moderation.