The hardcore are complete suckers for hype, even without substance, so PS4bone may keep going for awhile, even without much software of note. The main factors though that I see causing pretty significant drops soon are the fact that are are SO many hardcore type consoles out on the market now, between PS3, Xbox 360, Wii U to an extent, and now PS4 and Xbone, and the Steambox coming soon. You can only have so many similar consoles without oversaturating the market and having some consoles canibalize the sales of others. There is also the factor of the economy, which makes it far more difficult for consoles over $400 to sell to a mass market audience.
Eventually, these consoles are going to need the games to back up the hype, of the sales will start to fall. Even the hardcore cannot keeping buying these consoles on hype and the novelty of the new tech forever, without worthwhile games to play them on.
