Great question...
- Airline tickets
- Hotel rooms
- Home repair items (so big retailers)
- Pubs...yes pubs! I want to see if my pub tab would be greater at the start of the night or the end of the night
- Groceries
- Hip restaurants
I'll think of more.
I think these are some of the services in mind too. Most of these services in some places have started making use of bitcoin already as means of payment. What we need now is more of them to come to the play globally as this would really mean a whole lot to bitcoin's value. But I guess we aren't even there yet as there are still lots to do on the bitcoin network itself. Honestly, I just look forward to the day when I will walk up to anyplace and just use my bitcoin wallet to pay for all my stuffs.