The tipping point is the many, many, many devices that probably aren't running other anti-virus (smartphones and tablets).
So have the phone de-auth after a certain amount of time without you entering your credentials. You'd still only have to remember credentials to one device, and then *it* does all of the 'heavy lifting' of authenticating everywhere else.
Console game makers are now including first-sale codes that make them *far* less friendly for re-sale and rental. The last Resident Evil game on the DS even had no ability to delete a saved game, effectively making the game one play per sale. I forget which publisher it is (but I think it's EA) is even making their games almost unplayable unless you are either the first-sale customer (and have the in-box code) or you pay darn close to the initial sale price of the game to buy a new code directly from them.
Soon you may *not* be able to re-sell or buy used copies of console games.
Though I agree that there are too many cases where Devs are targeting a console release and only barely port it to the PC.