Hakoda said:
Most of those companies, which have seen declining sales over the last few years, will likely have their value decreased, while Apple keeps skyrocketing.
Android and Windows Phone 7 continue to make market
gains. Apple's iOS is no longer the dominant figure in mobile phone software. HTC is constantly breaking its profit records month after month, Samsung is not slowing down any time soon with their Galaxy S series. Apple is not skyrocketing, the industry as a whole is. In fact, with the industry skyrocketing, Apple's biggest competitors (in Samsung and HTC) are both seeing increased market dominance while Apple's share is being held at a stable rate.
Nokia's failure to support Android is the only reason they're falling behind. Even so, they hold the mobile phone market for the 'dumb phone' section, and remain popular in countries like China. RIM / Blackberry is selling at a stable rate, but is losing market share due to the rise of Android devices from Samsung and HTC. They still hold #2 on the market in their home country Canada.
Sony Ericsson's flawed Xperia line-up cost them in the past few years, which is why they've fallen so low.
I'd say the study is flawed in saying that Apple could easily swoop up and buy out the mobile phone industry because of 'declining value of competitors'. Samsung and HTC won't be going away any time soon, and both Motorola (Motorola Atrix) and Sony Ericsson (Xperia Arc, Xperia Play) have made recent efforts to introducing quality devices to get back in the race.