Alzheimer’s research might be further along than you thought.
Stem cell therapies are still an immature technology, but these tests will help determine how they might be administered, how long they might take to work, how cells integrate into the brain, etc.
Yes, this is good news indeed 
Just a few thoughts on this. It’s going to be an infusion in the bloodstream. It will be important to find out that there are no ill effects, such as unwanted cell growth or cancer in other areas. It is known that cultured stem cells can develop mutations, but these can be tested for and discarded - it’s much like the testing they do to detect cancers in biopsies from surgery. (Also one of the reasons you would not want to go to one of those clinics in south America or Thailand and have an unproven treatment).
If infusions into the bloodstream work though, it would be a minimally invasive procedure.
Adding: apparently some of the early trials of stem cells in Parkinsons (using an older technology involving fetal cells, which current methods do not do) were considered marginal as far as results because the trial period lasted 6 months. But they found improvement had continued at a 3 year follow up. It took longer than they thought for the cells to grow and connect and make dopamine in the PD patient’s brain.
So I guess what I’m getting at is don’t be discouraged if this trial isn’t a 100% success at the first go, it doesn’t mean stem cell therapies won’t work.
Cool word … … …