Computers have reached that no later than 2008. A level of quality that is basically sufficient to satisfy nearly all users, and if all you really care about is office, that level was already reached before the millennium rolled over. You could easily tell that by simply looking at how long you keep your computer. This one here is now about 5 years old and I still have no reason to replace it. I don't think a computer would have lasted me 5 years back in 2000, simply because most new software wouldn't run on it properly.
Today I'm hard pressed to find software that doesn't run and if, I'd be hard pressed to say I want or even need that software.
Same with smartphones today. People can do what they want to do with the cellphones they already have. The need to upgrade because the new version of your OS doesn't run or to finally run the software you want to run smoothly simply isn't there anymore. Better graphics, more CPU power, ok, but what for? Until we replace our computers with cellphones, i.e. having docking stations that turn cellphones into desktop replacements, the need for that power simply isn't there.