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Some background here:

Important bit is:

“Lexmark exhausted its patent rights in the Return Program cartridges that it sold in the United States. A patentee’s decision to sell a product exhausts all of its patent rights in that item, regardless of any restrictions the patentee purports to impose. As a result, even if the restrictions in Lexmark’s contracts with its customers were clear and enforceable under contract law, they do not entitle Lexmark to retain patent rights in an item that it has elected to sell.”

Basically, you can’t EULA your way into extension of patent rights.

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    So, I doubt it is far-fetched to think that soon inkjet printers will now be sold without replaceable ink cartridges and once the ink is used up you will have to buy a new printer.