Yes, this has been said for some time now, including by Whitty/Vallance/JVT
Large gatherings may be restricted for some considerable time, and I think masks and space will be standard. The extent of restrictions will depend on how many cases there are, and how full the NHS is.
Best case is that the restrictions stay as they did at around, say last summer, with rule of 6 type arrangements and some hospitality open, and a functioning Christmas concession. Worst case is that new variants escape the vaccine (and wild immunity from other variants) and the world is back to square one.
Or perhaps that should be one and a half - as updating a vaccine should take no more than 6 months (and could well be as little as half that)