Today saw the release of Presto Linux and Opera Turbo beta. I have been extremely impressed with both pieces of software and have switched to Presto Linux at work and have begun using Opera Turbo as my main browser. While whether these pieces of software will replace Windows XP and Firefox/Chrome in the long term they are both very promising in that they both offer significant speed boost in their respective fields.
Presto can boot in less than 30 seconds perfectly with all drivers working on an old machine where I had issues with the Windows audio driver. Opera Turbo offers noticeable speed improvement on nearly all web pages by sacrificing image quality; which does not make a lot of difference for most sites as most images do not need to be of very high quality to server their illustrative purposes. Presto sacrifices a lot of Linux functionality that I do not really miss.
If the direction these two pieces of software take gains traction I do look forward to a lot more streamlined applications that takes stripping away the fat to extremes and offers users a much faster but lossy experience, ala MP3 compression.