Moore's Law has held up for a surprisingly long time, but we can see the horizon now where current semiconductor technology won't be able to keep up with the exponential improvement. It won't be the end of the (tech) world if computers stop getting faster and faster at the same rate, but the shift might change several large industries. There are a few technological alternatives that could provide alternatives to our current computational standards. Quantum computers have promised a significant advance -- if they can be built.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post