In the mainstream consumer market (AVRs / licenses <$10k) there is no direct competition to ART. It is using cancelation similar to noise reduction technologies to control impulse response and room resonance.
If we want to compare technologies, it is from the perspective of this evolution and stacking of feature sets:
Dirac Live / Dirac Live Full Range - Audyssey / Audyssey MultiEQ XT / XT32, Yamaha YPAO, Sony DCAC IX / 360 Spatial, Pioneer MCACC, Tinnov RC in Sherwood AVRs, REW
- Per speaker distance / time alignment
- Per channel EQ
- Limited bass management
- Variable end user tuning - DL can apply Harman and other custom curves, requires XT32 to do similar with Audyssey. Unsure on each of the other offerings.
- Sony DCAC IX / Spatial 360 is getting lots of praise, but it seems to be coming from those who have not used room correction before. If anything this it is really bringing the technology to a wider cohort of consumers who would not have used room correction otherwise similar to D&M including Audyssey XT in the box. Seems to be hard to get clear facts on Sony DCAC IX features.
- No clue on Pioneer MCACC and consumer centric (<$10k) Trinnov / Sherwood offerings.
Dirac Live FR + Bass Management (multi-sub) - Audyssey XT32, REW (unsure if Sony, Pioneer, or Sherwood's Trinnov implementation have any overlap here)
- Multi-sub management
- Bass steering to multiple subs from all other channels / room balancing of LF content
- Audyssey XT32 a bit behind here as it levels all subs and then treats them as 1 channel, so arguably DLBM is already its own tier by the time we get here.
Dirac ART - No similar competitor in consumer space <$10k
- Impulse response control via cancelation / noise reduction techniques <150/300Hz,
- This frequency range covers the majority of room gain transfer function as well as frequencies which are difficult to room treat (i.e. large bass traps).
Looking further into the future, the next technology might be beamforming, but beamforming is a bit too position specific to a single listener in its most precise use (at least comparing directly to RF / Wifi beamforming which I am more vocationally familiar). Unsure if Trinnov Waveforming is an offshoot, I haven't tried to deep dive their tech specs and papers.