Technology often moves quite slowly: every barnstorming new product is usually followed by years or even decades of incremental improvements.
But from time to time a new technology comes along and transforms everything, leaving you wondering how you ever managed without it.
So which up-coming pieces of tech could transform the whole world, and which ones offer more hype than hope? Here are the current contenders.
1. Lytro cameras
The newly announced Lytro Illum is the first high-end camera to use light field technology, and it's the second camera from the company. Unlike traditional photos, light field images can be refocused after you take them - so if you'd rather look at the background than the foreground, you can change the focus with a click.
It's enormously clever and has the potential to revolutionise photography. But Lytro is a real underdog here: its images require a plugin to view and it's taking on a massive and well established market. Fans hope it will become the Dyson of digital photography.
2. Project Ara
Google's modular phone programme, Project Ara, could be much bigger than just phones. It's just as applicable to tablets, and Toshiba hopes to bring it to wearables too. Sensors and other key components would be swappable, so for example you might take the camera out of your phone and stick it in your smartwatch when you're going out, popping it into your tablet when you get home.
3. Oculus Rift
Facebook didn't buy Oculus VR just because it fancied doing some VR gaming: it believes the headset could be the future of movies and perhaps even social networking too. There are applications in architecture and education and 3D modelling, and it might just help people with phobias or PTSD too.
Yes, we know: so far it's all hype and no trousers. But one of the most interesting rumours is that the iWatch is being positioned as the replacement for the iPod and as a controller for the next Apple TV, essentially making it the One Ring To Rule Them All. Maybe those iRing rumours weren't so far-fetched after all.
5. Project Christine
Wouldn't it be great if consoles were as powerful and as expandable as gaming PCs while keeping their basic simplicity? Razer thinks so, and its Project Christine does for gaming what Project Ara does for smartphones. It's a fully modular PC where swapping out a graphics card is no more complex than unplugging a USB device. It's not a big deal for hardcore gamers, we know, but awfully attractive to more casual users.