I too want to request Vdice to focus on releasing apps for more number of platforms including windows mobile and blackberry platforms too.
I would suggest not to release anymore software on those platforms. Those platforms are either dead or just caters to a very few users which actually would be a niche that I think that should not be pursued. iOS and Android would be enough and just let others just use a mobile website. There are too much costs in creating and maintaining apps for multiple platforms so I don't advice to do it.
But I do see all the windows 10 based devices are coming with inbuilt tablet mode and touch based laptops are becoming most common but you are considering them as dead ? One thing is sure, having multiple choices are always good because every single user is most important for any business. If we are not able to provide the facility what he is looking for, that may lead to any level of consequences too.