Why PDA and Laptop?

You can use Laptop for anything that your PDA can...

As for which is the best.. I guess you would be better if you search the review on Cnet, pcworld or google it and compare.

as for Mapping, a GPS can be connected to your car or your computer..

As for traveling, there are many hotspot available all around you...

and for people happiness.. I think they are very happy .. if they don't, then it would not as many hotspot services as today... don't think?

To know what you want and initial configuration is the most difficult things... but as you see so many people can help you.. even google have so many informations...