Search engines have long advertised themselves as providing answers, when what they were really doing was providing direction. For example, Ask Jeeves, the first search engine I ever used, originally masqueraded as an e-butler providing answers to your questions, when all it was doing was using your key words to funnel you toward articles it considered relevant.
But Wolfram Alpha really does provide answers. No URLs come back in the results, only a page of often dizzyingly detailed and up-to-date information, like a research report culled by mad scientists with complete access to a universal library. For a telling example, let's compare search results on Google, Wikipedia and Wolfram Alpha for the search term "Pluto."
Google gives back a predicted waterfall of articles and pictures about Pluto, including the Wikipedia entry and some images of the planet and the cartoon dog. Wikipedia provides history of its discovery, formation, classification and controversy over its planet status. The Wolfram Alpha return is another thing altogether. It includes details you could find from Wikipedia, such as mass, radius and rotation period. But it also includes its current distance from the Earth and Sun and its current place in the solar system with respect to other orbits. Finally, the engine calculates its current sky position from the location where you just searched it (see below).

The
argument that something like Wolfram Alpha will replace Google, or
marginalize Wikipedia is bogus, and completely besides the point,
because the three engines fulfill entirely different functions. Google
is a funnel; Wikipedia is an encyclopedia; Wolfram Alpha is more like a
real-time world index.But just because W.A. doesn't aim to replace Google doesn't mean it won't impact Internet searching. Wolfram Alpha and Wikipedia are more than engines or portals: they're powerful research tools in and of themselves. Enter a math formula, like "x^2 sin(x)" and the engine will plot it and find the root, derivative, local max and min, etc. The question is: Will this make us expect our search engines to be all-knowing genies, not just guides? And when will Google feel compelled to provide its own tool that can similarly curate of the Internet to provide an answer to a search term in addition to (or instead of) a list of suggested links?










Of course Google has already done some of these things for a long time. For example, type 100 Euro into Google and it pops back with how much that is currently in USD ($136.12), followed by the usual list of search results. Google does this for all sorts of conversions, and some basic math problems...but Wolfram Alpha takes it quite a few steps further.
I think one of the more interesting things will be teaching users how to submit queries to this new type of "search engine." I know I went to the site right away, and then couldn't think of what to search for that went beyond one of the given examples.
I agree with Dylan's last comment- few things came to mind and almost all of them came back with the equivalent of an error message. For example, I tried several company names, but it only returned suggestions that I had meant to ask about something else. I do quantitative research almost every day and it doesn't seem very useful to me. I like the idea, but think they should have waited until it is more powerful. I still remember the day more than ten years ago when one of the guys in R&D asked me if I had tried Google yet- it changed everything.
you wrote:
`But Wolfram Alpha really does provide answers. No URLs come back in the results, only a page of often dizzyingly detailed and up-to-date information...`
key words: `up-to-date information`
Q1: are you sure?
Q2: what did you try, to say something like that?
Try this one: `swine flu` ...info is 4 days old!
Q3: do you need more examples?
Thanks,
2009May19Tue14:41 California time