I would not expect lots of windows... I would expect limited portals at the front or back or in the ceiling away from individual guests. Real time graphics is not an issue anymore.
That assumes you have some bias that the truck is a bad or cheap out choice to start with. I've not heard any reason it is. It's the best option because it gives you the most volume of space to work with within a reasonable budget. The open question is...
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Because just because it's possible, doesn't mean Disney did. And we don't know what they are doing yet.