The most exciting thing from a business perspective (that they didn't touch on at all in the presentation) is the new dock!
They're moving to a universal dock model that's similar to the third party USB port replicators, but with the Surface charge/data connector cable.
Which means I can have SP 1, 2, 3, 4s, and Surface Books all deployed to users and not have to keep three different docking stations in inventory.
That's *huge* as far as making a business case to buy these things goes. Model-proprietary accessories are always a big red flag when it comes to major hardware deployments.
I was kind of interested in the dock and wondering how it gave pass-through power. I was hoping through a secondary USB-C port so it can be used as a MacBook 12" or Chromebook Pixel dock as well. Are you sure it uses a Surface charge port to give pass-through power? (EDIT: Oh I see you're referring to the Surface dock, that's still highly proprietary... I was more interested in the Lumia dock)
Either way, though, kind of a moot point as it appears to only have USB 2.0 input which makes it worthless as a new-gen ultrabook dock. No USB 3.0 flash drive or external hard drive support is pretty lame for a 2015 docking accessory...
The $79 Apple Digital USB-C adapter only has HDMI out which means no 60hz 4K support, and a single USB 3.0 port is a bit limiting. It's been 6 months since that laptop was released and still no perfect dock exists for it.
I'm waiting on something with an internal 60w+ PSU, pass-through charging, at least two USB 3.0 A and C ports, HDMI, DisplayPort for 60hz 4K, and Ethernet.
Kinda surprising to see only the Lumia get USB-C. I was hoping the Surface 4/Book would have a type C port, it's the future and would mean quicker adoption of universal docks that would support all mobile devices.
They also made no mention of the digitizer tech, as far as I know, during their event, so I'm assuming the Surface 4/Book have the exact same N-Trig digitizer as the Surface 3 with zero hardware improvements? I don't consider the Surface 3 digitizer to be on par with Wacom, yet. Would have liked to hear that some type of hardware upgrade was made by N-Trig.
I currently use a Note 4 and a Fujitsu Lifebook T732 both Wacom "Penabled". I think the iPad Pro/Apple Pencil look amazing as far as stylus tech goes, miles beyond anything Wacom is currently doing. But I'm not gonna spend $1,000+ on an iOS device just for doodling, wish they would've introduced the Apple Pen in a MacBook or something with OSX so it can do real productivity work as well as creativity. If I'm gonna spend over a grand on a mobile device it better be able to serve as a primary work AND play machine.
All this new expensive hardware coming out, and all of it falls short in some way. Increased portability and extra power do nothing for me if we're going backwards in stylus tech, and improved stylus tech means nothing on a neutered operating system.