Tech companies and plaintiffs attorneys both see biometrics as a huge business opportunity—with the former eager to use facial recognition, voiceprints and other biological indicators to authenticate users in ever-more-sophisticated products, and the latter eager to sue alleging privacy violations. Legal observers say those attorneys are becoming even more aggressive in 2023, charting new tributaries under Illinois' landmark biometrics law and dusting off old statutes around the country to establish new claims.