I'd be very surprised if Glenn does anything with curved boards until the outcome of the current IACA ballot of national association mebers on flying boats. If the proposed rule gets a yes vote then they'd be a goer. With a no vote the Commission chaired by Andrew Landenberger would be asked to revise the rule wording for further consideration.
There is an interesting explanation of the commission's considerations on the IACA website.
The general view of the current curved boards used at the Worlds seemed to be no real advantages over the commonly used canted boards. They do look good and have market appeal........... No one has been able to measure a difference though. It's certainly not an obvious thing like the change from pinhead to flat tops in 1988 or the change to carbon masts in the mid 90's.

John Dowling
AUS9