I don't see goggles replacing SDs- only being
another kind of screen. People with established desktops will still have established desktops. People wanting to set up new static workstations will likely still do it as they do it now. I chose a 40" ultra-wide for my main desktop. I love the expansive screen RE and it doesn't put any weight on any part of my body. For all I know, it is weightless as I never lift it. However, it's also fully anchored to that spot.
When I travel, I can't have that great screen with me. As is, the traveling choices are 16" or less. I really feel that dramatic difference. Goggles might deliver a virtual MacBook screen that is the much coveted 17" revival. If so, why not a 20" option too? How about 24"? How about 30"? 36"? 40"? 50"? 100"? The keyboard + trackpad half doesn't need to grow at all but the as is paradigm of a laptop basically forces the bottom half to size up to match the top half. This can break that general constraint for anyone wanting a >16" laptop.
It's hard to imagine Apple ever going greater than 17" in a MB again. So how might they deliver a bigger screen MB without making the whole thing a lot bigger?
CES debuted some laptops with rollout/foldout (extra) screens: basically 2 physical screens in one laptop.
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Perhaps the folding screen technologies being experimented with mobile devices may come into play? Perhaps the rollup screen technologies may bring something? Goggles may be one more, fairly compact (almost certainly lighter weight) option for a mobile Mac experience without needing the whole Mac to be an unwieldy size.
Typical, commonplace example: business travel (that's me) wanting to do some work on the long flight. Many airlines have seats so crammed there is simply not enough space to open a laptop on the tray table and get to work. The tray table barely has enough room for only a keyboard. I've actually "rigged up" what amounts to a hanging iPad screen (hanging on the back of the seat) and a bluetooth keyboard on the tray table before. I'd much rather have a real computer with a much bigger screen but you do what you can when you need improvisation.
So potentially this puts a bluetooth keyboard in the bag (too). Pull out goggles like some pull out headphones for the flight, put them on like people put on headphones/sleep masks now, and that becomes the screen "half" of the laptop. Put the keyboard on the tray table. A simple bluetooth keyboard is small enough to fit on any tray table.
The VR eliminates the cramped quarters feel of the seat. Suddenly the seat right in front of you is no longer there, nor are any other seats. Summon your Studio Display VR or my Ultra-Wide VR in the goggles... or perhaps 2 of them side by side... or perhaps 4 of them if you need that much RE. AR shows your keyboard on that tray table and then your hands when they start using that keyboard below the virtual screen(s) you have chosen to use on this flight.
Is this appealing enough to pay for it? How much do business travelers pay for a single size screen laptop now? If "time is money," how much would it be worth to business traveler to get work done on all those flights vs. getting nothing done because they lacked sufficient room to use their laptop? How many first-class seat upgrades (for the working space) would it take to wash $3K as a one-time purchase?
And that's just one common example. Look around at the technology landscape now. Lots of entities are experimenting on ways to deliver bigger screens for portable/mobile tech. Folds, rolls, projector, are all in play now. This might simply offer another way to deliver sizable screens without fattening up the rest of the tech that doesn't need to size up to fit the larger screen.