If I need to open something, I'm much more likely to open another tab of my browser and dump queries (especially things like exchange/conversion rates) into Google. It's a shame, too, because the demo here is really persuasively showing that this can automatically do stuff I previously assumed necessarily takes an extra brain cycle or two.

Not all, only in one single line, and without memory of previous calculations (I'm sure this has "variables" -- if not Soulver, which is similar, does). Not the same at all.

Similar apps already there: Soulver, Calca.

For instance, this morning I was calculating the % uplifts of a recent sale and it quickly became annoying to do it all in spotlight but equally annoying to move all the numbers to Google Sheets once I was part way through. This would have filled the gap perfectly.

I'll be using Spotlight more for basic calculator stuff now though, never knew it could do that :)