I am not even worrying about that because I have to focus on what is going to happen in the present.
If there is continuous development of the bitcoin and it is adopted by many business, the price will be much higher.
Steam has lots of users. So it is good for the bitcoin when it starts to accept bitcoin. It would be better if you can get some discounts.
I have spent bitcoin on other websites, I never get any discount by using the bitcoin, even though it costs less for the merchants.
It would be better for the bitcoin accepting website to offer some discounts. Their cost is lower than credit cards.