You can't plan disruptive tech/fads/products by committee.

The best incubation tube (and target/reward) for potentially disruptive development is an active and sizeable target market.

Agreed, but as someone has to have the ideas somewhere it's not just down to random chance, therefore I thought it was worth asking for people's opinions on what they think might make for useful disruptive technologies/applications/use-cases.

Target market size is important to get acceptance and test things, but is not directly related to the development of "disruptive technologies" - that needs skilled programmers and people thinking about the future. I'd like to think we have both of those in the Maemo/Meego community.

One disruptive technology which would be relatively easy to implement would be a Mapping/navigation solution which learnt your preferred repeated routes. For instance I often run sygic on the commute to work for the traffic updates, but it always tries to route me a particular way for the last few miles, which is always congested on a morning.

The idea about the calendar/alarm app being location and route aware, and monitoring the travel status and adjusting the alarm leadtime accordingly is a great one