Apple right now reminds me much like early Microsoft. They have been getting huge the last couple of years and no end is in sight for them. Also in the same way, just like early Microsoft, a large number of people are still skeptical and unwilling to make that switch. Microsoft is/is going to be on the decline in the next decade or so. Apple is growing and growing with great ideas coming from every direction, while Microsoft has been struggling to keep a hold on its "fan" base. Microsoft will always stay alive solely for the cheap computers in the business place, but as more and more Microsoft software is being mad compatible with Mac's, even more people with home businesses are going to pick a Mac.
Looking into the future, if you'd like a company that's going to bring new, high-quality products and applications in the future, pick a Mac. If you like how Microsoft has been these past few years, pick a PC.
In either case I'd say get a desktop over a laptop...