1 Terabyte of RAM
Currently, RAM (Random Access Memory) is coming in sizes of ~4 Gigabytes, that's the kind of maximum you would expect to see in a modern (albeit high end) PC. However this will most likely increase in the next few years, as it has in the past.
For example 2.5 years ago, my family bought a PC that had 256Mb of RAM, which we upgraded to 512Mb, and that was quite a lot back then, but a year later, most PC's were coming with a minimum of 512Mb, the majority with 1Gb.
So I think in 5 years time, we'll easily be looking at what we consider stupid amounts of RAM, though most likely for servers, not desktop machines. In fact I was just reading an article on Slashdot about "How To Use a Terabyte of RAM", it was more specifically for the Linux Kernel, however it provokes some interesting thoughts on what could possibly be done with that much RAM.
