What will be the next gaming style era?

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When i started playing PC games, RTS was very much in like Age of Empire II like at those times FPS wasnt much in. Then came RPGs but after the release of Battlefield 2 FPS took over all other styles and many FPS came out like FEAR and RECON and now online games are becoming very famous. What do you think will be the next gaming style which will take over FPS and Online gaming