Software. BTC will become a generally accepted currency in software (including video games) markets. As a matter of fact, it is happening now and I think that it will continue happening in the future too. I think it because BTC is a virtual currency and fits well to buy virtual products with it. When it comes to physical products, orders could get complicated. However, BTC's technology, blockchain, surely will thrive in every business area.
Yup certainly websites like G2A is accepting bitcoins which is quite good news but the prices on the website or 20-30 % high.
There are some pros and cons of bitcoin.
the bitcoin merchants keep increasing , and almost on anything we can buy it with bitcoin ,
just the matter of the time , when we can go anywhere and found a shop adopt bitcoin ,
for now it is really hard to find one in real life ,
i just predict it wouldn't happened in the near future.