I suspect we'll creep up in gb's connections purely on market competition, as some of the non-OR networks have already been putting in extra capacity as they have been building their networks. So they are going to want to use that in an attempt to overtake OR. But OR will respond.
I think it'll be between 1gb to 10gb.
I think we have to remember that at some point, as I've been saying for years on these forums, most tv broadcasting is going to be on fibre connections in the future. So the current network speeds and capacity will have to be enhanced for that.
For the average household 1gb is probably all they need, though I think there will be speed options well above that available to buy in 2033.
BT Full Fibre 500