Well I'm guessing that mass market for such a device can only make sense in the context of business or special use case which you can market to people who can't see value in a portable computer... In that case maybe it's lacking the very specific, hand holding, applications to realize specific tasks in a very easy and obtuse way.

My guess is that device will of course make FOSS users and techies happy but that mobile device power users will be the limit of its reach... Though that all depends on how applications show up and how they integrate with highly fashionable products that have nothing to do with quality, just ads and general consumption trends.

I'm hoping that we can reconcile both and actually have an open and mass marketable device pleasing both techies and grandma but right now, I think we'll have to wait to at least version 6 for the grandma part...