These are the recently introduced Post-it Extreme Notes, Post-its that are water resistant and stay stuck to almost all surfaces including wood and brick through the rain, cold or heat (although they can't be applied to already wet surfaces). What took so long? You can get a 3-pack of 45-sheet pads on Amazon for around $5. Granted I'm sure these will come in handy for a lot of people who need weather-resistant Post-its, but I don't, I just need the one I have stuck to the bottom of my computer monitor with all my passwords on it.
Keep going for several examples of extreme Post-it usage including hot water pipes that should probably get marked with something a little more permanent than a paper rainbow.
Thanks to hairless, who informed me he's going to stick up a bunch of extreme Post-its in the shower for when good ideas come to him when he's lathering up.