Of course, the question remains is that those bones that were found in the Tower the remains of the two Princes. They really should consider doing DNA tests on them.
DNA tests are useless in isolation - they need to be compared with other tests to draw useful conclusions, and we do not have many results to draw on.
The most reliable DNA from ancient burials is mitochondrial DNA, inherited from the mother, but the Princes' mother was Edward IV's wife, Elizabeth Woodville, and we have no idea what her mtDNA was like. It would be carried by her maternal-line descendants, like Elizabeth (Henry VII's queen) and her son Henry VIII, but I can't see that anyone getting permission to test the DNA from those royal skeletons for comparison purposes. I wonder if there are any female-line descendants of Henry VII's daughters, the Princesses Margaret and Mary? Margaret married James IV of Scotland, and Mary married Charles Brandon, Duke of Suffolk and both had female issue, so it is a possibility, though a remote one. Other possibilities lie through the maternal-line descent of Elizabeth's sisters. They all married, and presumably some of them had female children.
If we were very lucky the scientists might be able to extract Y-DNA from the bones in the Tower, which could be compared with that of Richard III, and the Beauforts, and that would be interesting. Then autosomal DNA, if extractable, might tell us whether the two boys were actually brothers (or at least closely related) but extracting ancient DNA from skeletal remains is always a toss up.
Then if the DNA suggests that the bones from the Tower came from two brothers, or that they were related to Richard III or the Beauforts, where does that get us? It certainly won't get us closer to who killed them (if they were murdered). The Tower of London was a royal residence, and any number of people had access to it, so the field of potential murderers remains wide open, as it had always been.