Ron's failing his Apparation test will result in him signing up for additional classes, held in [[Muggles' Guide to Harry Potter/Places/Hogsmeade|Hogsmeade]], over the next few weeks. This will be mentioned in passing, as will his eventual success in the test, but will not have any significant effect on the story.
As mentioned, Harry ishas keepingbeen saving the potion into hopes ofhelp improvingimprove both his and Ron's situationsituations regarding girlfriends. As luck and Felix Felicis would have it, he manages that as a side effect of his efforts to retrieve Slughorn's memory. [[Muggles' Guide to Harry Potter/Books/Half-Blood Prince/Chapter 24|We will find out]] that the blazing row Lavender started when Ron and Hermione appeared unaccompanied from the dorm ended that relationship, leaving Ron free to startpursue a relationship with Hermione, one whichthat will turnturns out significantly better. At the same time, Ginny, who has already complainedannoyed aboutby Dean's over-solicitousness, will misinterpret Harry's invisibly pushing past them as a final instance of that and will break up with Dean, leaving her free to answer Harry's pursuit.
We will find out in [[Muggles' Guide to Harry Potter/Books/Half-Blood Prince/Chapter 23|In the next chapter,]] we learn that Slughorn's memory is, in fact, critical to our understanding of what Voldemort is doing.
