
Even at the dawn of personal computing, there was never a shortage of devices to choose from.
In the mid to late 1970s, there was the Apple I and II, the Commodore PET, the Radio Shack TRS-80, and the TI-99/4A. Before that there was the Altair 8800, but it didn't include a keyboard or monitor, so while it was technically a personal computer, it was only ever useful to hobbyists.
The Altair 8800
The selection grew in the 1980s and included the ever-popular Commodore 64, more Apple II variants, the IBM PC and its clones, the Apple Lisa and Macintosh, the Atari line of 8 and 16-bit personal computers, the Commodore Amiga, and more.
The Commodore Amiga
By the 1990s, the only personal computers left on the market were PCs and the Macintosh. All the others were dying out, and by the end of the decade, no real competition was left. A new breed of devices came on the scene, though, the Personal Digital Assistant (PDA). These included the Apple Newton and the Palm Pilot, but they didn't have the raw horsepower of a "real" personal computer. What they did was provide a handheld option to offload some of the work of the PC.
The Palm Pilot
The 2000s saw the advent of handheld devices with robust operating systems. Nokia built rudimentary smartphones, but towards the end of the decade, Apple introduced the iPhone, and Google began releasing Android phones with similar features and power.
Today we have a dizzying array of smart phones, tablets, desktop computers, laptops, and 2-in-1 computers of all shapes and sizes. Whereas Windows was the dominant operating system in previous decades, now Linux, ChromeOS, and MacOS provide much needed competition. And any of these personal computing devices are inexpensive, which means almost anyone can afford to buy one.
Computing has never been more ubiquitous than it is today, or more accessible. And while all personal computing devices aren't created equal, meaning not all can run the same applications, and some tasks are more easily completed on a "real" computer versus a tablet or phone with operating systems customized for those devices, most people can perform most tasks on any device they choose. This levels the landscape and empowers people so they can buy the device(s) they prefer and can afford and provides a vast market for software developers.