In a big conference hall your title page should contain some useful information for the audience that is walking in ("Is this the right session?"). When designing for online presentations platforms (such as SlideShare), they need to grab the attention of the site visitor without patience. Pretty much like the posters you used to put up for your events near the coffee machine in university.
Here is my coffee machine poster for a lecture I will be giving at the Technion in Haifa, Israel next week. In case you are in the neighbourhood...