In my opinion from a commercial point of view i think HTML UI will be in a more favorable position as it will enable users to more easily author their extensions given the fact that Michael will soon be unable to follow all the requests and may concentrate on the geometric core and the supporting api and sdk so that everyone might build own uis and features relevant to ones core business and Michael will maintain just a basic app..
Hi igor, yup that's one of the ideas behind using an HTML based UI in the first place - that it is more familiar to a wide range of people and that tends to make it easier for people to customize things or author new pieces of UI.