As a consequence, you can get surprisingly good odds against the Tories getting near 200 seats - one spread betting firm has their figure at 186 seats - if you 'buy' this and they get more, you make a fortune.
If I'd bothered opening an account (small pile of paperwork needed) then I'd be very very tempted. If I'd been really sensible, I would have opened one ages ago and put money on the LibDems getting more than 50 seats. They'd now need to get nearly 70 to make money, and I think that's about what will happen, though I'd love to be proved pessimistic on this.
So while the overall outcome may be as certain as it gets, there is interest and hence temptation to have another 'all night' watching session. It won't be as much fun as 1997 though.