The external valves, and associated bags, are all additional causes of infection — and this would cut those out.
It's really hard to change those bags without spillage. This cuts that out.
The external pipework getting caught on things and causing pain. Solved.
You have to adjust the kind of clothing you wear so that you can have space for the catheter bag. This would cut that out.
The location of catheter bags means that people with certain kind of mobility problems can't change them themselves - this would cut that out. This one directly affects a friend of mine right now. Four times a day that have to be around somebody who is willing to change a catheter bag with them. They cannot get up at night without somebody to disconnect/reconnect the night bag.
The whole issue of not knowing how full the bladder is - this would cut that out.
Never being able to go swimming. Never being able to have a bath. Solved.
If this can be made to work well, and it's a big if I'm sure, it is a game changer and a major quality of life improver.