Originally the government launched the consultative process saying the data for the 1:25k and 1:50k scales would be available for free. That is the free raw data that would still need interpretation. That means the likes of the companies that already offer OS map based software would get more out of it and still have a business. However there would need to be new business models. Plus the way the 3rd party apps goes there will always be some techy putting out free software to convert this data thus making it truly free for all.
However what the OS and government has done is a very watered down version of the original proposal, probably caved into pressure from vested interests to protect existing OS licensees. What you have now got is 1:10k and 1:50k without important features like footpaths. Now if you think that is free mapping then its good. If like me you like to have 25k and 50k maps with footpaths and other features that as an outdoors person you might actually need then you don't have anything you didin't have before. Or at least nothing worth anything.
BTW some paper maps companies were hoping to get access to the OS data to offer improved maps to their customers. They are not being offered the data they need so you still have the OS monopoly on the data and the constricting licencing arrangements you had before. No cheap electronic mapping no improved paper maps and a prime opportunity for the government through the OS to do something good has been missed.
Sorry if I have a negative viewpoint but its just a sign of my disappointment at the missed opportunity. BTW who uses a 1@10k scale map? The only times I have used this scalehas been orienteering however the more common scale was 1:12,500 for this applcation. Even the excellant BMC / Harveys maps have 1:15k scale on the information page for certain sections on the main map such as the area around Scafell Pike and the descent details on Ben Nevis (the correct distance/bearing details to avoid going over the edge of the gullies).
Anyway I suppose it is a start.