What will become of today's BP dates as Time Marches On?

So far, dates that get a BP are generally far enough back and have a large enough margin of error for it not to matter whether they are 40,000 BP or 40,100 BP.

I do find the subject of this thread and the idea of a different way of relating languages quite interesting. However, I have a gut feeling that this syntactic structure thing is either being oversimplified or overly simplistic. English itself has, in the last thousand years, changed from a synthetic language in which word order was not very important to an analytic language in which it does. In the last five hundred years it has changed from one with a subject/verb/direct object/indirect object word order to one with a subject/verb/indirect object/direct object order.