This would be nice but at the moment I don't know any hotel where you can pay with Bitcoins, online or on the spot. I only know about some websites where you can pay with Bitcoins for air tickets. Maybe some hotels are advertising this service but actualy you can use for payment only Bitcoin debit card not with Bitcoins directly. Hope this will change.
If this mode of transaction would be implemented on all over the world it could be a part of development and progress to bitcoin. We all know that a lot of people mostly foreigner are capable to check in to hotels when they visit or go to other countries. So if there at going to be a mode of transaction with. The used of Bitcoin it could be a good part on having a universal crypto-currency that could be used on transaction wherever, whenever making transaction easier and fast.