Will mobile devices replace desktop system units and traditional laptop computers? How would networks have to change if that were to happen?

What will be an ideal response?

Clearly, this trend has already begun. Most experts predict that the greatest change will occur in fast-paced areas such as sales, marketing, and field-based activities. When it comes to payroll and accounts payable, perhaps not so much. The important issue is whether an organization can take advantage of mobile technology to become more nimble and effective, no matter what the application.
With regard to the second part of the question, powerful wireless networks will be needed to connect mobile users and wireless clients. This trend is also is well underway as tablet computing and phone apps surge in popularity.