This is exactly what large institutional investors wants, because they do not want the hassles of opening and managing wallets and worrying about the safe-keeping of those coins. This is going to be a significant event, if it is approved. There is also a lot of other ETFs where people would invest in say Gold, without dealing with any physical Gold.
We will also see a large influx of fiat capital and a much larger demand for bitcoins, if this is approved.