Tablet "independence" from PC?

I'm a 70 yr old who has used computers since '86, and I have a Droid smart phone which I frequently screw up with unintended "touches". That last part worries me the most about a tablet, but I also have had concerns about what I cannot do on the tablet, such as download digital pics from my camera or access Microsoft Word files from the PC. Recently I found I could dump all of my Word docs onto Google Docs, apparently solving one problem.

Will the tablets eventually be able to replace the PCs for casual users like me?