Yeah, but this is how it was with ADSL too.
Back when ADSL rolled out, and people only got 512kbps, there were no limits. You could literally download constantly at maximum speed for the entire month.
Then along came ADSL Max and people got bumped to 1 - 2mbps. Suddenly caps started getting introduced, so low that your speed had gone up but the amount you could download had literally declined by several orders of magnitude.
So whilst with the advent of basic FTTC unlimited has once again become the norm, don't count on currently unlimited bandwidth meaning perpetually unlimited bandwidth. It wouldn't be the first time in the UK that increases in speed have seemingly paradoxically meant decreases in the amount of data you're actually allowed to download. That's exactly what happened last time.
ummmmmm... nah , speeds went up to 1024 down ... ADSL MAX went up to 8mb down .
I have NEVER had anything other than unlimited with DSL.. EVER.. there have always been options for unmetered bandwidth.
so it's not what happened "last time" at all