The question itself though is a bit like asking who will win the Superbowl in 5 years - who knows? If you can answer either question I suggest you head to Las Vegas and make a quick fortune on the betting tables. If you look at the past five years, I would say that unquestionably the most influential organization in the geospatial industry has been Google (it's hard to pick a single person from there). Five years ago they weren't even in the industry - they hadn't yet acquired Keyhole and hadn't launched Google Maps. But the whole landscape of the industry has completely changed since their arrival. So if you asked the same question five years ago, you would have entirely missed the most significant influencer. Now I guess that doesn't mean it's not fun to speculate of course, but a poll (as Joe somewhat acknowledges) is not the best way to pick up the more interesting up and coming people, who by definition many people aren't aware of yet. If you are going to do a poll like this, a more realistic question is who are the most influential people today, or over the coming year - which in reality is probably what this poll boils down to anyway.
In the glaring omissions category, the most obvious individual to me is Andrew Turner; I don't see how you can not have Microsoft in the list in addition to Google; and when looking at Google I would think you have to include Michael Jones - though again it's hard and somewhat arbitrary to pick a person or a small number of people from there. As someone commented in response to the poll, there is also a strong case for Vivek Kundra and/or Barack Obama too, in terms of what they are doing to make government data more easily accessible in the US.
Anyway, this all got me to thinking who I would put in my top 10 people likely to be influential over the next 5 years, and so I have decided that next week I will publish the "geothought top 10 people to watch in the geospatial industry" list. I have a pretty good idea of most of my choices, but if you have suggestions or want to send bribes etc, please let me know :) ! Currently I think that 3 of the Directions top 10 are likely to make the list, and the rest I think were not in the 22 nominees. But we'll see, it will be a bit of fun :).