The genetic takeover/substrate migration is a useful reference class, but (although I agree with you that in some weak sense the intelligence explosion is already underway) minds that can rewrite themselves in place will be qualitatively different from anything that has happened before.
Sure. Memes were new. Technology was new. Machine intelligence is just the applicationn of technology to minds. The digital revolution has replaced most of our analogue media - with one major exception.
If you have graphic design experience, check out the on-going logo design competition at 99designs for the Singularity Institute. There are still 6 days left to enter and be eligible to win the $295 prize if your design is selected. Tell your friends with graphic design experience too. There are very few submissions currently.
Note: This is a blind contest. Designers can only see their own entries. All designs will be revealed when the contest ends.
If you're interested at getting a peek at the designs, they will be online after the competition is over. This is standard practice in 99designs contests to prevent designers from contaminating each other and having all the designs drift in a certain direction.