MIDs in the Big Picture
Since the iPad exploded onto the scene, and tablets began taking over more and more of the computing device market share, MIDs went from items only purchased by gadget enthusiasts to everyday electronics in high demand. This newfound popularity of the tablet form has led a slew of manufacturers to throw a bunch of Android MIDs into the market. Some are cheap and flimsy, and some quite sleek and powerful and seriously worthy of consideration over competing Apple devices. Although it's up for debate whether the nicer and larger ones are really called MIDs or just tablets. But whatever the name, tablets running the Android OS are a viable option for those who either can't afford the steep price of an iPad or would prefer the open source and customizable nature of Android.
With the higher quality choices being so expensive, there is a gap in the low to mid range tablet market that the various cheaper Android MIDs are filling. There is also a size gap, as iPad currently comes only with a 10-inch (25.4-centimeter) screen, although there is a rumor floating about of a 7-inch (17.8-centimeter) iPad in the works. Google Nexus 7 and even media players like the Kindle Fire might help fill the void partially. But where there is a popular device, there is always a cheaper knock-off, and an even cheaper knock-off of that knock-off, so the existence of a number of variously priced and reviewed devices was inevitable.
With the popularization of the touchscreen and tablet form, it's doubtful these devices are going away anytime soon. If a consumer needs a computer more for entertainment and Web access purposes than business productivity, he or she may even choose a tablet over a laptop or desktop and not miss much. And MIDs have potential business uses, as well. They can be used to take inventory, orders or payment, where before paper, desktops or credit card machines were required. As they become more and more prevalent, there is no doubt the number and usefulness of available productivity apps will increase, as well.
And despite the existence of the lower quality MIDs, this variety isn't all bad. It means you can research what's out there and choose based on your price and capability needs. Just be sure to read tons of reviews and specs before making a purchase.