Personally I don't think that anything intangible can be property. And whenever I purchase something digital I consider the act to be a donation and/or payment for a service of delivery.
Overall I don't think that we would be significantly worse off, especially now, when it's technically possible for general public to engage in croudfunding.
As for the big tech firms - why wouldn't they exist? Would Google be disrupted if tomorrow all patents in the world became unenforceable? Or Amazon? Sure, MS might be in trouble, but what they are doing already feels like a gradual switch to a service/subscription based model.