Here's another arbitrary list - The Revised Top 20 Sexy Science Fiction Costumes.
I don't think there's a geek alive that wouldn't agree with picks at #1, #5 and #19, but once again these guys have managed to compile a list with conspicuous absences.
Okay, that last one may not count technically as a "future" hottie but I really don't care. It's Raquel Welch for God's sakes. She will rule the past, present and future.
UPDATE - I meant to add this one for Swiney.