The world of wearable computing really took off with the introduction of Google Glass, which sold for $1500 and offered hands-free computing on your face. I personally owned one and loved it for the most part, but the project eventually fell apart -- embroiled in privacy concerns and so much more. But, with Apple pushing for a new wearable for 2021 and beyond -- Google was close to 10 years ahead of Apple with wearable computing.
Google Nexus 5
Google had a really huge year in 2013, with Google Glass and then the Nexus 5 smartphone -- made by LG Electronics for Google, and co-developed by Google. Google launched the Nexus 5 with Android 4.4 KitKat at the time, increased Google Now (which was a huge deal at the time) and a bunch of great features at the time for an excellent price of $349.
One of my most-used products in my life is my Google Chromecast, as I've been an avid user of the small media stick since day one. The opriginal Chromecast offered streaming directly from your device, which blended beautifully with the Nexus 5 smartphone at the time. There are 10s of thousands of Google Cast-ready apps to choose from now, with Chromecast's quickly becoming the most-used device with streaming services like Netflix, YouTube, and others.
DJI really birthed the modern day UAV world, with Chinese company DJI breaking onto the scene with its original Phantom series of UAVs in 2013. It was capable of shooting 1080p and 4K video at the time, with quality only improving in all aspects of DJI's growing line of Phantom series UAVs since.
2013 was also the year of the Xbox One, with Microsoft's new console being pushed out with the Kinect sensor, too. It was a successful console release with the Xbox One moving to the x86 architecture over the previous PowerPC architecture used in the Xbox 360. The Xbox One was followed by the Xbox One S and Xbox One X models over the years providing 4K Blu-ray playback support, and beefier internals.
Sony had one of its most successful consoles of all time with the PlayStation 4, which to-date has sold over 100 million units. Sony really changed the game console world around with the PS4, which was also joined by the PlayStation 4 Slim and faster PlayStation 4 Pro consoles over the years. One large caveat is that the PS4 never had an internal 4K Blu-ray player, but left that to Microsoft and its Xbox One S/X consoles -- it did however, have a regular Blu-ray player.
Ethereum (first proposed)
Ethereum was first proposed in late 2013 by Vitalik Buterin, with the full system going live on 30 July 2015. Imagine if you got in early with the 72 million "pre-mined" coins at the time, the cost even compared to the post-crash pricing now would've made overnight millionaires.
AMD Radeon RX 200 Series (Hawaii)
The last truly kick ass GPU architecture from AMD that was also a successful seller, with plenty of great custom graphics cards was the Hawaii GPU architecture and the Radeon RX 200 series back in 2013. This spawned the flagship Radeon R9 290X and the dual-GPU behemoth in the Radeon R9 295X2 at the time which was an amazing piece of graphics card history.
Look at how far NVIDIA's G-SYNC technology has come since its inception back in 2013, with gaming monitors packing the G-SYNC module right up to 4K 144Hz goodness. There's even Big Format Gaming Displays in 65-inch TVs that feature native 4K + 120/144Hz refresh rates thanks to this technology that started in 2013.