1) Lack of resolution. At the moment capacitive screens have less (about half) the resolution of the actual LCD screen, while resistive screens have an even higher resolution than the LCD screen it's used with.

2) Capacitive screens work only with with capacitive objects, like your (ungloved) finger, or a specially made stylus. A resistive screen works with _anything_, and with the demonstrated screen technology this becomes even more important - think of the possibility to use an actual paint brush, or any item you find that has the line thickness you need. No more walking through a menu to change the 'brush': Using a real brush is much more flexible - turn it as you go, and watch your wiggly line change between narrow and wide as you paint it.

1 can be remedied in future capacitive screens, 2 can never be.