As someone who represents many startups from the legal angle, I have a good number of clients (especially serial entrepreneurs) who are attacking "high-value problems" faced by enterprise customers, and these often involve the more traditional desktop/server types of products - these may not be the most numerous but they are by far the most substantial in terms of resources invested and likelihood of high-value ($100M+) outcome.
That said, a large number of my startup clients (probably 60%+) are doing web-related apps as well.
That said, a large number of my startup clients (probably 60%+) are doing web-related apps as well.