[rajpaul]

The computer made a lot of things obsolete. For example, typewriters, carbon paper, and those calculators that printed to roles of paper.

Tablets won't make anything obsolete, let alone desktop computers.

[joshuaheard]

"those calculators that printed to roles of paper" are called adding machines, or "10 keys". They are still around in a virtual form.

If you have a full size keyboard with the number pad on the right side, in Windows, you can open Calculator|View|History, and you have a digital adding machine right on your computer.