I'm all in favour of finding real solutions over the resurfacing approach, absolutely. But, I am a confirmed sceptic, and I like evidence based approaches to everything.
I love the sound of stem cell magic, and magnetic resonance. But how come short lived results? I smell some quackery.
I would immediately look for the bone growth, I find it surprising that in the stem cell topic, and this one on magnetism, there is no mention of new X-rays that show the positive improvement in joint space or bony growth. Didn't they take any before and after to measure and provide the evidence I crave (or that might expose it as snake medicine)?
We seem only to get anecdotal short lived improvements that I suspect are placebo, or possibly the cushioning or anti inflammatory effect provided by whatever is injected. This is true of glucosamine sulphate which many poor elderly folk end up spending a fortune on in the hope of results whilst no true study has shown proof it really works (my experience was my fingernails seemed to grow faster!).
Not wishing great possibilities away, but if they aren't measuring the degree of success, or otherwise, of the procedure it seems the process of finding something better than what we have available today is only prolonged.