Will databases be commodities?

There was a time when business payed for a file server. Not anymore. The same can be said about directory services, most of networking services or even web servers. Most of nowadays OSs just give them for free - you just pay for the OS, and use the services you need. The question is: will databases follow the same trend and get commodityzed?

I believe they will. Why:

1. For ages Microsoft and Oracle have given us versions for free of database products with some limitations.
   
2. Database systems seems to have stopped evolving.
3. Business and database vendors seem to recognize more value on applicational platforms.
4. The next generation of developing paradigm will take away visibility from the database. More, it will hide it them so well we can probably swap them whenever we want.
   

Give this, I think that the database systems like SQL Server and Oracle will be given away with the OSs in no more then 5 to 7 years. Ok, maybe some very very high-availability and scalable versions will still be sold, but that's it. Let's read this again in 7 years :)