Really? Don't think I read that in any preview articles. Thinking about it I only use them to access music and videos on an SD card and if I remember rightly 8.1 will allow content on SD cards to be available without the work around. I hope it isn't the same on Pro, I use them quite a bit.
Does the 50:50 split work well?
I haven't had any problems yet with apps freaking out in 50/50 view, but its still early. I don't use either of the apps you mentioned. Browser, people, twitter and mail seem to do fine.
I'm really digging the option to add more tile rows and still keep the full-screen keyboard! Totally unexpected...