So to follow up on my first impressions. I'm, I mean my daughter is, still enjoying Disney Infinity on AppleTV. I've had the chance to compare it against the XBox One version, and I've had chance to become more familiar with the limitations of the AppleTV version in general.
In general, the graphics are clearly a step up on the XBox, but not in a way that seemed to add anything to the experience. The cartoony/fake plastic style of DI lends itself well to simpler textures. I was expecting to be more wowed by the XB1's version. That said, there's a lot of content (especially in the hub) that you simply don't get on the AppleTV.
1) entire sections of the hub are MIA. In particular the Forest Moon of Endor is not present on the AppleTV. Brave's castle is forced to do fill-in work here for jump training.
2) Flynn's arcade is in (apparently) permanent ghost mode. The building exists but is in the white, not yet activated, form. Whether this is due to limitations with the AppleTV, GameCenter, or just that Disney/Avalanche haven't worked out what they want to do here yet, I don't know.
3) Only one account can be active at one time. This means if you're playing two player, the second player is just a second incarnation of the primary player. Essentially this is what other platforms call 'guest mode'. Whatever player two does, adds to player one's stats and achievements.
4) The Disney Infinity site seems to be ignorant of the Apple TV's existence, so you can't link your iOS install's account to your console. To be clear, the accounts are the same, and web-codes for characters and play-sets are shared, but the iOS version just sees that as purchased content.
Many of these limitations are due to memory constraints with the Apple TV, which brings me to my last point. If you're thinking about buying this for the Toy Box specifically, be aware that the Apple TV quickly runs out of memory when building games or worlds in the toy box. I had no trouble at all pegging the memory just working through the training quests in the INterior. You wont be able to make worlds that are as densely furnished on the AppleTV as you will see on other consoles. This also means some 3rd party toy boxes are going to run like dogs, if they run at all.
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What apps are bumping into the 2gb limit and redownloading content?
Well, Disney Infinity!
Also, a tvOS update could easily and instantly change the limits of each app (perhaps even depending on the size of your ATV too), thus reducing redownload times. However, you're never going to get more storage space than you start with.
As more apps come out, and as Apple tweaks its local/streaming storage model, I think you're going to find that the 64gb model redownloads far less frequently than the 32gb model. The question remains whether those will happen before you decide to upgrade to the ATV5.
I'm hoping this is one those situations where Apple begin cautiously then relax the rules, cos right now, the limits are too low.
As for an ATV5, unless they greatly bump the system RAM, I'm not sure I'd have much reason to upgrade. As a TV streamer/media device, the ATV4 is fine as-is (4K would be a plus of course, but not a necessity just yet). As a console it needs a lot more grunt, and I'm not sure Apple would go that path, so if anything in a years time, I'd be looking to pick up a PS4 or XBox1 for cheap.