Unless you’ve been living under a rock, you've probably heard of something called binary. Binary is (essentially) the basic language computers think in. A normal processor inside of a computer is made up of transistors. A transistor is a small grouping of atoms that can either have a positive or a negative charge. Thus, a computer thinks in binary (either positive or negative) charges.
In the past few years, there has been an effort to create a quantum computer. A quantum computer's processor is not made up of transistors but instead of qubits. A qubit can be a one or a zero like a normal transistor, but it can also be in something called a superposition. In other words, it can be in a state that is neither one or zero but is also both at the same time.
A quantum computer can do certain calculations (such as calculating prime numbers) that a normal computer cannot do. Another property of quantum processors is that due to the nature of the qubits and how they interact with each other, whenever you add another qubit to the system, the speed of the computer doubles. In theory, a quantum processor that consists of three hundred qubits would be more powerful than all of the working computers in the world right now.
In the quest for the first quantum computer, Google has now beat the competition. Let's start with some background information. By the end of last year, Google successfully created a 49-qubit quantum computer. Only four months into 2018, they have already outmatched themselves. Recently, Alphabet Inc., the owner of Google, unveiled that they successfully created a 72-qubit quantum processor. That means that we have taken a much closer step to making quantum computers faster than normal computers, otherwise known as the quantum supremacy.
So, what are the implications of this? Well, experts have stated that there will probably not be a world where everyone's computers run on qubits, as they are just too fragile. Another implication is on the topic of encryption. Right now, the easiest way to break an encryption in a computer without actually having a key is to keep trying different keys really fast. A quantum computer could, in theory, try every encryption at once.
So, does a quantum computer affect you? Yes. Is it a good or a bad thing? I would say good because we can use the technology to better understand our universe. Who knows, maybe there will be yet another breakthrough in the field.