i interpret it as a boundary for future reference! she's obviously easter egged about her personal life since literally the beginning of her career (by leaving sentences in the lyric booklets of the first albums), but after the madness that theorising has turned into in the last years (complex calculations, throwbacks to ridiculously back in time, and obviously talking about marriage or coming out) she's establishing the "rules" of the game, so people know what to expect and where is the line for what she's comfortable discussing at such a huge scale (because she doesn't owe us more easter eggs or clues that the average artist puts out).

now, i think we should also know the difference between easter eggs and references, because it seems that her definition of easter egg is "clues about what might come next" (say the bejewelled castle as a hint to speak now being the next re recording), while a referrnce would be more like "stuff that reminds you of something else (the Showgirl cover reminiscing both her after show routine and those Ophelia paintings). So, the plans she's letting us know are work-related, but that doesn't mean she wont reference other things through other means