I agree, and would love to have the ability to access FTM from the cloud. I work mostly on my desktop but in the evenings would love to work on my laptop. I know there is always the thumb drive or Dropbox option but that can be cludgy, to much room for error. I would even be willing to pay a subscription for that service.
I have so much more info on FTM then on A.com tree. Since everything is moving to the cloud it might be a new market for them. Have a FTM cloud based version, where you could still back up the file locally, and offer a traditional "software" version.