Sure. Anything that gets people travelling. There needs to be a global standard and plan though.
Testing still has a place though. I can get a lamp (spit) test once a week for free at work. It was designed for flight crew but has been rolled out to engineering.
Download the app, scan the box, scan the tube, spit in the tube and results emailed and uploaded to the app within 3 hours. It’s that simple, picks up asymptomatic cases and is approved by the WHO. You even get a QR code in the app to scan to allow you to fly, enter areas etc.