I've always thought it'd be nice to be able to code at the speed of thought - you can often envisage the code or classes that'll make up part of a solution, it's just so slow filtering that through your fingers and the keyboard; if the neural interface 'thing' could be solved that'd be a winner I think, both for coding and manipulating the 'UI'.

It seems within the bounds of possibility to me (from having no experience in the field ;), if patterns could be predictably matched in real-time or better time than it takes to whack the keyboard or move the mouse (can EEG or FMRI make predictable sort of patterns like that?).