I believe there are multiple reasons that Belkin should provide a web interface for managing an indivisulas WeMo network. Here are some of the reasons I would like it, I am sure others have some good reasons also.
1)Cell phones become obsolete too quickly to be used as the only manager for a product that should be expected to be in use for many years.
2)I use my WeMo device in remote locations, some are hours away but accessable remotely. If I lose/break/upgrade my phone, it is unrealsitic to have to travel to all of my remote sites to get my network back on my phone. A web interface would not only allow for me to continue to control the network, but could possibly allow for me to push my network to the Belkin App on my new phone.
3)Phone operating systems update so frequently, requiring frequent application updates, which can only lead to issues for us users.
4)Belkin should have no issues with constructing a web interface considering they have been in the networking game for years.