"create organisms with wholly unnatural attributes and traits not found elsewhere in nature"
I'd argue that this shouldn't add anything categorically new, just like switching from 32 to 64 bit programs doesn't change the world.
If future work can add new artificial amino acids mapped that can be specified using the new base pairs, then it would be adding something categorically new - but still seems pretty far off.
Maybe not "new" in a systems perspective, but new outcomes thanks to being able to control the system.
This is less like 32bit to 64bit and more like moving from binary to trinary logic.
Even more like a move from 4bit to 6bit logic.
Which also wouldn't do anything remarkable.
Well binary and ternary number systems can express the same numbers, they just do it in a different way. I don't think there's a good computer analogy here.