It's for former Anglicans. This was done to accommodate the Tradtiional Anglican Communion. It's being presented in broader terms so that others still in the "official" Anglican Communion have a path as well.
Those who think things in the "official" Anglican Communion are just fine will have no need of this option.
There’s one ambiguity here: if these new structures are being established as havens for Anglicans, but if married Anglicans cannot become Catholic bishops, will the bishops heading them remain Anglican bishops or will Catholic bishops be assigned to lead the transferred congregations?
My bishop is quite married and his orders are rock-solid Apostolic. If our communion could be aligned with Rome in the way described and if my current bishop could be my bishop in the new structure, then I would be very content. Otherwise, this is just another press release adding confusion to an already-distressed situation.