I believe I know what you mean.
For my part, I miss rounding the corner of the LEGO aisle and actually being surprised
by a new set - and by surprised, I mean never having seen a hint, whisper or leaked photo before encountering it on the shelves. This would happen regularly in the very first years, as the internet hype and continuous buzz hadn't fully developed, not to mention I hadn't yet discovered it.
Now, to be genuinely surprised by something new in the store would require living in a hermetically sealed cave, sans wi-fi
I specifically recall discovering the second year of SW sets - the entire wave with the first 7144 Slave I - all on the shelf at WalMart. Pure joy! Now, not so much. Over these 14 years (wow!) it seems we've all developed a sort of sixth sense about what's next. Aside from building a much-anticipated new set, the speculation, discussion, and the very first leaked photos is where the fun is at. By the time new stuff actually hits the shelves, it's quite literally old news. Funny.