Overnight Apple launched a new line of upgraded MacBook Pro notebook computers, all of them improved in significant, even major, ways.

Technically there are five new models, but the are best grouped into three. Two of them have 13 inch displays, one has a 15 inch display.

I was going to write that the biggest innovation this year was the “Touch Bar” available on two of the models, but then I thought maybe it was the new thinner designs. But perhaps the wholesale shift to USB-C/Thunderbolt 3 ports is it. Or the thinner, higher quality, more efficient Retina displays. Or whatever. Well let’s start with the Touch Bar, because that is a marked and surprising departure from past practice.

The entry level 13 incher has a standard keyboard with the traditional row of function keys (along with a few extras) across the top. The higher level 13 inch and the 15 inch MacBook Pro models have dropped those and replaced them with the Touch Bar. This is a touch sensitive strip running the full width of the keyboard area with an underlying display strip. That means it can display “soft” keys and other indicators to show its function.

The 13 inch Apple MacBook Pro with Touch Bar

The 13 inch Apple MacBook Pro with Touch Bar

So what? Well, its function can be optimised for whatever application  is currently in use.  Doing some audio editing? A slide along the Touch Bar could be the master volume control, while soft keys on either end could select tracks.  Apple seems to have already added support for a number of its own apps:

The Touch Bar places controls right at the user’s fingertips and adapts when using the system or apps like Mail, Finder, Calendar, Numbers, GarageBand, Final Cut Pro X and many more, including third-party apps. For example, the Touch Bar can show Tabs and Favorites in Safari, enable easy access to emoji in Messages, provide a simple way to edit images or scrub through videos in Photos and so much more.

This also incorporates Touch ID, otherwise known as fingerprint recognition, for easy login, a first for the Mac. There’s a new Apple chip, the T1, to guarantee its security.

Touch ID being used with Apple Pay, available in OS X Sierra

Touch ID being used with Apple Pay, available in OS X Sierra

On the subject of touching your Mac, all models feature significantly larger Force Touch trackpads.

These MacBook Pro computers are all thin. Both 13 inch models are the same size: 14.9 mm thick by 304.1mm wide and 212.4mm deep. That makes them 17% thinner than the previous models, and 23% less in volume (I’ll trust Apple’s arithmetic on that). And they are 200 grams lighter at 1.37kg.

The 15 inch model is 15.5mm thick (down 15%), 349.3mm wide and 240.7mm deep (volume reduced by 20%) and weighs 1.83kg, also down 200 grams.

The displays are 67% brighter (500 nits), offer 67% higher contrast, and use 30% less energy. All of which sounds pretty impressive to me. The resolutions are 2560 by 1600 for the 13 inch display on both models, and 2880 by 1800 for the 15 inch model.

The 13 inch models rely on the inbuilt graphics of their i5 processors (Intel Iris Graphics 540 and 550), while the 15 inch gets a separate Radeon Pro graphics card, with upgrade options available.

What’s all that mean? In addition to their own built in displays, the 13 inch models can also support an external 5120 by 2880 monitor, or two 4096 by 2304 external monitors. The 15 inch model can drive two of the higher resolution displays or four of the “mere” 4K monitors.

Which brings us to connectivity. Yes, all models still have 3.5mm earphone/microphone sockets! And built in speakers with improved bass and “double the dynamic range” (technically, that’s a three decibel increase, but perhaps Apple means something more).