Yahoo! Finance reports: "The PC's role in Japanese homes is diminishing, as its once-awesome monopoly on processing power is encroached by gadgets such as smart phones that act like pocket-size computers, advanced Internet-connected game consoles, and digital video recorders with terabytes of memory."
The article makes one good point that recent computer advances are only evolutionary and not revolutionary. So business and people don't need the latest and greatest PCs they can buy. Their old computers are working for them just fine for right now.
IMHO: Personally I believe this will be a short term trend, but that is only based on my own speculation. Surfing the web from a phone no matter how advanced is a pretty awful experience when compared to a PC.