So I feel like I saw this somewhere, but in re-reading the whole thread, I couldn't find it. I believe iOS and Android native apps are coming, but not on 8/16, correct?
Assuming so, if you join Goko, buy expansions, and play online via browser for now, my guess would be, when it is released, you could download the (presumably) free iOS/Android app, log in through it, and have access to the same cards you bought via broswer? And if that is so, it would mean you always need an Internet connection to play via the future Dominion app? Thinking about it more, maybe it's like the Ticket to Ride implementation where you unlock the cards via IAPs and they reside on your device so you can play offline--although then I don't know how that interacts with your previous purchase of DA pt. 1 (or Seaside, or whatever) via browser. I just wonder if we're going to end up buying expansions twice if we start with the browser version and move to the native app.
For now, a required Internet connection is no change from what we have today, so nothing changes tomorrow on 8/16, but the idea of playing against Bots/adventure mode offline on the bus or train on my iPad was a hope for me someday.