I think that this takes a bit of looking at and details are sketchy but I think that there will be a new version of the Microsoft ‘School Agreement’ (this is the one where you pay a single price and it covers all machines for ‘everything’ (ish)).
Judging from this article MS are saying that you now don’t have to pay for machines that are not using MS products – clearly I don’t understand it fully.
Not an article for everyone I guess but maybe interesting to some. Please comment if you understand it more than I do.
(it also reveals something of the relationship between MS and BECTA)