While is hard not to appreciate the PDA's ability to change with the times, it appears that its heady days of mobile dominance are coming to an abrupt end. A number of factors are competing in the mobile products field right now, all of which are vying for the same buyers. While the most formidable competition is from the smartphone, there is also pressure from small laptops, the UMPC, increasingly capable cell phones, and a few other takers, like portable media players. We takes a look at the future of the PDA and if it will be able to survive the onslaught of alternative mobile devices.