Market research is always questionable, and somewhat self serving, but this survey (Keane) has significant results in favour of financial planning tools online.

Consumers Are Still Not Getting the Online Services They Need From Their Banks

The Keane study discovered that many customers want to improve their financial planning but they need – and say they are willing to use – online help from their financial institutions. 80% of Aspiring Planners said they would be likely to use expert advice and online guidance on financial matters and more than 60% would use an online diagnostic planning tool to help them understand the type of financial person they area.

Despite their apparent willingness to use these features if available, Aspiring Planners are not satisfied with how their financial institution’s Web site helps their planning process or with the advice given on the site. Only 26% agreed that their primary financial institutions’ sites are helpful to their planning activities.
…

Respondents were asked to categorize themselves by their levels of  planning capability. The 35% of banking customers who answered "I do all of
my financial planning" were labeled the "Super Planners." The 61% who  answered "I know I need to plan but I need help" were termed the "Aspiring
Planners."