"you’re going to want to do" <-> "you'll want to do" - please explain the differense
I've met a phrase, that seemed a bit strange to my mind:
"What you’re going to want to do first is review all the ways that articles (a, an, the) work in English, by reading through a short and clear grammar explanation."
Which I understand as "Probably, the first thing that will call you to do is to review..., etc."
In Grammar books, they interpret "going to do" as "will do" but with a predetermined plans of yours to do it.
So, my question is how one can predetermine the desire, the willingness of doing something?
I also googled about the matter and found a discussion about the similar phrase - "I am going to want more food."
The discussion was in Russian between Russians and, unfortunately, without a sound word of native speakers.
The latter seems to me to be more out of logic. How one can be going to want something? Common sense says, that you either want or not. You can't make plans for boosting your wanting feelings, can you?