Location with context please?

Not really sure this is an idea as such, but I'll jabber on about it anyway.

So on the web location is the next big thing. Find things, go to things, target content, target adverts etc.

But location provides have no real context for the person at the location. For example, my location might be Leeds but where I am is at work, but just because I'm in Leeds doesn't mean I'm at work. You see?

Anyway I reckon the "next big thing" isn't all that until location has a context.

Maybe context could be deduced from time and IP range (plus location :o)?

For example say its 7pm and my IP range belongs to a B2C ISP then its likely I'm at home, change those numbers at little to 4pm and a B2B IP range and I'm probably at work. Using a public Wifi ISP and near home? then I'm probably socialising or shopping, Wifi ISP and far from home then I'm probably on my jollies. This falls to bits when you're on a radio/telco network big you get the idea.

What to do with all that context is the really big question.