I definitely agree, it's hard to make a single platform that appeals to both right now. Part of my alarm, here, is that I don't think most "core" gamers are thinking this through all the way.
Back in the PS2 days, as the casual audience was just taking off, "hardcore" gamers had most of the bargaining power in the marketplace. Casual users were basically relegated to the Playstation 2, a system focused primarily on "core" gamers but which had some games for casual users to buy in its later years.
As time has gone on, however, the casual audience has grown. And grown. And become more and more profitable. The casual-focused platforms are growing and growing in turn, while consoles contract and stagnate. I think it would have been better for "hardcore" gamers to accept some sort of reasonable compromise some time ago. As time goes on, the realities of the battlefield are increasingly favoring the casual gamers and the platforms they frequent.