This is a source taken from Reading Improvement magazine, and it lists an estimated timeline with a computer scientist and a few buisness firms.

1971: 4004 Processor
1972: 8008 Processor
1974: 8080 Processor
1978: 8086 Processor
1982: 286 Processor
1985: 385 Processor
1989: 486 Processor
1993: Pentium Processor
1997: Pentium II Processor
1999: Pentium III Processor
2000: Pentium 4 Processor
2006: 3.4GHz processor, 2GB RAM, 800GB hardrive - $1011
2011: 11GHz Processor, 16GB RAM, 16TB Hardrive - $740
2016: 37GHz processor, 131 GB RAM, 320TB Hardrive - $541
2021: 122GHz Processor, 1TB RAM, 8400GB Hardrive - $396
2026: 400GHz Processor, 8.4TB RAM, 128PB Hardrive - $289
2031: 1.3THz processor, 67TB RAM, 2.5EB Hardrive - $212

This is, I assume, all taking into account rates of predicted inflation(since this was done with a buisness analyst). So yeah...that's the relative price you can expect for computers like these...in the "near" future. Not surprising though, considering technology tends to have a "J-curve" like graph when plotted against efficiency over time.

For reference:

TB = Terabyte = 1000 Gigabytes
PB = Petabyte = 1000 Terabytes
EB = Exabyte = 1000 Petabytes

All I have to say is "HOLY SCHNIKES!"