I have always thought the term 'power' in the technology is a word used when people cannot articulate what they specifically mean, ie, it has to be taken in context of the discussion to make sense of it. (No offense intended to anyone here.) The success of the R-Pi will be the platform that supports it. A system that has a multitude of peripherals available and an extensive range of software to my mind much more 'powerful' ('useful' in content) than one that has nowt. The processor, the amount and speed of memory on board, the OS and so forth become meaningless, but is often the gauge of 'power' ('better spec' in context) if there is no application and hardware support.
What could ultimately make the R-Pi successful in the education world will be the availability of cheap (sic free) software and extensibility add-ons for it. The format and and especially pricing and aim of the R-Pi capture the imagination in a way I don't think I have seen since the BBC Micro was released and that didn't do to badly, did it?
Raspberry Pi Assembly Language now available in book and eBook formats.
For details, go to www.brucesmith.info - examples and programming hints and tips.
Check out the Raspberry Pi Resources page on the website for more information.