There was a time not so long ago when laptops came with little lid-locks to keep everything in place. MacBooks moved to a magnetic clasp, while most other laptops now just find a way to make do without a lid-lock, thanks to a little thing we call gravity.
The (almost) squared-off screen is about as archaic as a boxy 4:3 television set. While HDTVs jumped right into 16:9, laptops detoured for several years into 16:10 territory, and Apple's own MacBooks are now some of the only laptops left with 16:10 screens (except for the 11-inch MacBook Air).
Somewhere between RCA and HDMI connections, there was S-Video. It was mostly used from the mid '90s to the early 2000s in pro video applications, because it separated brightness and color onto two separate channels.
Sitting next to it is a parallel port, mostly used for printers before those all went USB, and today, wireless.
This is why we appreciate the Universal Serial Bus (USB). It may look like a VGA port (which it's sitting next to in this photo), but the serial port was used for...well, other things, that we now use USB for. Interestingly enough, the Sega Genesis had serial ports for its controllers.
A look back at this PowerBook G4 almost made us do a double-take: In retrospect, it has an absurdly tiny trackpad. Recent extra-wide clickpads may have spoiled us a little, but with the growth of multitouch devices, including phones and tablets like the iPad, it's clear that we're far more touch-oriented than we were a half-decade ago.
We're finally saying goodbye to ExpressCard slots on most laptops, and the PCMCIA is another remnant of an era gone by. Devices ranging from external storage to modems and network cards used the slot.
We hear that modem ports are still useful for business travel to remote parts of the world, but right now we're getting along just fine with Ethernet and Wi-Fi. That's one port we probably don't need, unless we're time traveling.
Laptops used to have thick keyboards that looked ripped from desktop hardware. Comfortable, yes, but also bulky. The nearly universal move to smaller, flat, raised keys has helped shrink the thickness of the laptop chassis, and are nearly universal now.
We forgot that one of our old MacBook Pros actually came with both FireWire 400 and 800 ports. The original FireWire was a mainstay for iMacs, hard drives, and iPods once upon a time, and 800 never really caught on. Now, USB 3.0 and Thunderbolt will duel it out for higher-speed data transfer. Hmm, maybe we're still not really consolidating after all...
Before USB and Bluetooth, keyboards and mice had to be hooked up via PS/2, a technology considered "legacy" even in 2000. But it stuck around for a long time anyway, largely because of its compatibility with KVM switches (devices that let two computers share a single keyboard and mouse).
Apple's move to integrated batteries that weren't user-replaceable was done in the name of longer battery life, which we appreciate. However, the trend has spread to so many devices that we're now almost surprised when we see laptops with removable batteries.
Once upon a time, laptops had matte screens by default. The glossier edge-to-edge treatment on many newer laptops is more eye-catching, but a nightmare for reflections and glare. Many business laptops still offer this as an option, but it's almost impossible to find on consumer laptops.