My summary with notes inline.

New MacBook Airs

• Faster processors, up to 2GHz i7 in speed
• Upgradeable to 8GB of RAM (previously limited to 4GB)
• Up to 512MB of SSD storage at twice the speed previously available
• USB 3.0 and USB 2.0 in a single slot rather than two separate slots like most laptops
• $100 less than the previous models
• Shipping today

Save your money. Buy a MacBook Pro with retina display.

New MacBook Pros

• Quad-core i7
• Faster memory
• Faster graphics processor
• USB 3.0

Save your money. Buy a MacBook Pro with retina display.

Next Generation MacBook Pro

• As thin as the MacBook Air (0.71 inch)
• 2880 x 1880 resolution Retina display
• 220 pixels per inch
• Up to 2.7GHz, Turbo Boost up to 3.7GHz
• Up to 16GB of RAM
• Up to 768GB of SSD storage
• USB 3.0
• HDMI port
• MagSafe 2 (trouble - more adapters for everyone!)
• Thunderbolt
• Shipping today

Link to Apple.com

Starting configuration at US $2,199.

Watch the Apple promo video

Updated Apps for Retina Display

• Aperture (Mac App Store link)
• iPhoto (Mac App Store link)
• Final Cut Pro (Mac App Store link) - 100% of the pixels for a 1080p video in the edit window

Mountain Lion

Mountain Lion is the next version of OS X

• New documents in iCloud. Store, sync your documents in iCloud. Apple.com info on iCloud
• Messages app for sending iMessages from your Mac (hopefully much improved over the beta that's been really buggy thus far)
• Reminders.app similar to Reminders on your iPhone/iPad that sync via iCloud
• Notification Center with a very important feature: "Temporarily disable banners and messages — if you connect to a projector, they’re disabled automatically."
• Voice dictation built in
• Safari updated with a unified search bar (like Chrome)
• Open tabs in Safari are synced between your Mac, iPhone and/or iPad
• Power Nap feature which allows the Mac to keep up to date while it's asleep,  compatible with recent MacBook Airs and the new MacBook Pro with Retina Display.
• AirPlay Mirroring - allows you to send your screen (i.e. Keynote) to an AppleTV equipped TV
• Game Center syncing between your Mac and iOS devices
• Only $19.99 USD upgrade, coming in July via Mac App Store and on new Macs

Link to Apple.com's section on Mountain Lion

iOS 6

• Siri is improved - International support, including Canada, so hopefully other new things like Open Table/Yelp integration, finding movie times and auto integration (hands free directions) work for us here.
• Siri can now launch apps, which is nice.
• Siri comes to the iPad
• Facebook integration for easy sharing of your photos of your cat.
• New phone app with finer control over Do Not Disturb options, reply to a phone call you can't take with a message, geofence an area to remind you to call someone when you leave or arrive.
• FaceTime is enabled over cellular data, not limited to wifi anymore.
• You can unify your phone number and Apple ID. So if someone calls your iPhone, you can answer that call on your iPad or even Mac. Same thing with iMessage
• Improved PhotoStream that allows you to choose people to share them with
• Passbook.app to store all your passes (i.e. boarding pass, Starbucks cards, parking pass, etc.)
• Guided Access for children with autism.
• Single app mode locks an iPad to one app so students can't switch to Safari to look up answers on a quiz. Or, as @jessejanderson reminded me - letting your toddler play with an iPad and have access to just one app.

Maps is the big feature that they saved for near the end. Turn by turn navigation support, uses anonymous real-time crowd-sourced data for traffic flows it can alert you to a different route that might be quicker. You can ask Siri "Are we there yet?" Beautiful 3D flyovers.

Link to Apple.com's iOS6 section

Coming this fall, support for iPhone 3GS+, 4th gen iPod touch, and 2nd-gen iPad+.

Initial Thoughts

No Apple TV that will change the world but given all that they announced, the only people who should be disappointed are the dumb pundits and rumour mongers who worked everyone into a frenzy saying it was coming.

Same with a new iPhone. That's on a yearly cycle now in the fall.

The MacBook Pros with retina display are going to be huge. Just like seeing a retina enabled iPhone or iPad, once you use one your current MacBook will look old and busted. So my advice stands as it did for the new iPad - just don't look at one and you'll be fine.