I actually think that this is a pretty great time for people to be getting into PCs as an alternative solution. Not only would you have better graphics for the same price as a console (including tessellation), but you could hook a small desktop up to your TV via a HDMI cable. There are some very nice and console-like boxes out there right now, too.
Why bother, though? Well, Steam sales, for one thing. You'd have mods for loads of games, for another. Plus, it's an open platform, so you don't have to buy from Steam, you could buy from any number of outlets, such as GoG.com, or even direct from the developer. The PC also has the largest library of games, due to the nature of its backwards compatibility.
You'd also be able to tweak it to run as you like, and you'd be able to use it as a media device. The PC is still the best media device on the market, and everything is available to it. Plus, if you get a mildly recent budget graphics card, you'll be able to stream to mobile devices. Want to lie on the sofa and play Skyrim on a mobile device? You can.
If you're at all curious, then this overview of Steam's big picture mode is worth a look.
The thing is is that with consoles being so expensive now, the PC is a valid contender to the console market. If you want a PC to be a console, then you can have it be a console. And if you like graphical fidelity, then you can invite a friend over and show them your PC doing all sorts of crazy things (like tessellation) which even the next gen doesn't have yet.
No matter how much the specs of the next generation change, if it's graphical fidelity you're after than even a half-decent, budget PC is going to trump it. This is because console hardware (factually speaking) is always at least four or more years behind the curve of personal computers.
PCs are adaptive things. You could have one and take advantage of all the stuff that I take for granted, but you could have it behave as a console.
Just something to keep in mind.