Touch screen NO!!!
I repair computers as a side job and some of the disgusting screens I have had to clean would amaze anyone. Consider that you have a nice high resolution screen and then you have nice sticky/oily fingers, screen resolution goes down the dumper from all of the oily smudges, YUCK!! Give me a nice keyboard/mouse for most use and keep the touchy feely for the little devices that do not have space or need for a proper control interface.