To me, it means since they can identify the specific antibody key to neutralizing the coronavirus, it leads to more promising treatments (a cure). Right now, Hydroxychloroquine (combined with other meds and maybe Zinc) and Remdesivir seems to have some kind of success. However, their potency seems to be a bit lacking when administered after the virus has been widespread in the body. However, I can be wrong about this, but I think I read that somewhere. Isolating a key antibody that neutralizes the coronavirus will definitely help greatly to finding a cure that's way more potent and could possibly be administered even if the virus has been spread everywhere within the body. However, I'm no scientist and I'm only interpreting what I've read/heard.
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On a separate note. The print screen below is to give props mainly to BC and AB. BC, for the first time in like ever, only had 8 recorded cases today. It's the first time I've seen single digit # of new daily cases in BC since this whole thing started. That likely means there's either very little to no community spread in BC anymore. Also, the number of resolved cases (deaths + recovered) is 59. That's a -51 resolved vs new cases for the day. Whenever you can get the R0 below 1, your city/region/country can eradicate this virus from that place. BC is doing this right now and that's not bad for a population of 5 million, where 3 million of them live very close to each other (Lower Mainland).
AB is also at -222 cases today as they only had 57 new cases with 259 resolved cases for the day. ON was -270 or so yesterday, but is +52 for today. For Canada, other than QC and ON (and even ON is improving by leaps and bounds), it's actually doing pretty well against this virus. All the provinces and territories (other than QC and ON) have either double or single digit of new cases, with some having 0.