You know what would be a fun revival, now that I think about it? The $64,000 Question.
From what I understand, there was a pilot not long after Millionaire debuted in which the top prize was $1,028,000. Feel free to Lesko me on this, but if I was producing it, I'd call it The $6,000,000 Question with $1,000,000 as the final step before the top prize. It'd be interesting to see whether anyone would gamble a million based on their specialist subject.