You could fit 13,000 4K movies in 262TB. But Netflix will have versions for different resolutions/output devices pre baked so I reckon (I wouldn't want to gamble to much on this) that a single device wouldn't have everything.
Working in the other direction is that the region locking works by region you're in, not where you opened the account. So an edge cache would presumably never have titles that are only available in different parts of the world.
