Reading what they're offering, the stand-out to me is making publishing the applications easy for others on your team to use. That would he a pain point for non technical users.
Even though they portray some of the benefits of this app as unique to desktop apps, they're not (e.g. storing data on device, offline mode etc.).
Am not a hater. Love Raycast. Saw the post and opened the link intrigued what they came up with and was somewhat disappointed tbh. Good luck to them anyway!