GW has updated it, yes. But to say it was an update would be very misleading. I have been subscribed since June, waiting for the updates they have promised, but while they have come through on a few things, many of the main features that they sold it as never materialized. That said I do understand that many will get some use out of it... right up till their codex gets updated and they now have to buy a new one. It’s a great idea, but so poorly executed.
If you like reading the lore, this isn’t for you. If you want to play crusade (something I really wanted included, but no rules for it here) this isn’t for you. If you have an army that is or will soon be updated to 9th edition, this isn’t for you.
The only people I can see this being for is if you like having digital access to the main rule book (well an index of it anyway, good for rule searching), or you want to take a peak at what 8th edition army rules look like. And if its the later reason then just use battle scribe, its free and wont automatically become locked out when a 8th army is replaced by 9th. So dont waste your time and money like I did. But hey, its up to you.