Here's my logic (Not homework help, just some random thing lol)

[BlackVeedramon]

I think they won't be updating quite as quickly in the future as PCs start to die down. They'll probably lay off a lot of their developers.

If by PC you mean "Personal Computers" they are not dying down, PCs are still used for serious business "Work, videogames" and so on. As cool as portable devices seem to be, they are still severely limited. The only people who updates their PC once a year are gamers, work places they to delay updating the OS and hardware for as long as possible. That's why Windows 8 is more focused on portable devices, people does buy new ones every year.

There is also productivity, you can type faster on a keyboard than you do on a blackberry, and less hardware limitations means a lot of tasks get done faster in a PC.