there's a few misconceptions about the lifespan of consoles - Sony for instance - the PS2 had a 10 year lifespan, but it does overlap with the release of the PS3 - that's how it'll go with the PS4. As for the 360 - that won't be the only platform the MS has on the market - in a couple of years there will be another 'next gen' console from MS.
I never had a misconception about the life cycle of a console, it's when new consoles debut that has changed. I chuckle at the PS2 reference...very few survived ten years. I never owned one but replaced plenty of bad DVD drives for friends. I had an xbox that worked for three years from day one, and my friend's xbox ate itself on day three. On the other hand I went through eleven 360 consoles in the first year and a half and my friends 360 never flinched the whole time. Would have been less if I had told MS to go screw themselves and mod it sooner. Point being, life cycle is relative.
Also maybe you need some glasses? I mean, I regularly game with no issues. I agree that screen tearing is annoying, but certainly not nausea inducing. Besides, not all games are 30fps....perhaps you are just a little 'sensitive' and by I mean 'sensitive' I mean talking out of your arse perhaps?
I have 20/15 in my right eye and 20/20 in my left. Lasik surgery. I don't get motion sick while driving or boating...must be the refresh rate. Yes I'm sensitive. I've been gaming since I was ten years old, and over time my eyes have adjusted. I have a tendency to not blink while playing games. Maybe that has something to do with it. All I know is it was a struggle to beat Darksiders due to the constant screen tear and low framerate. Of course, not all console games are 30fps, just the majority, with the minority being <30fps and 60fps games being the little yellow bus of the industry. Even then it gets fuzzy since animations aren't always adjusted to the framerate. Sure they refresh the screen 60 times a second, doesn't mean anything else refreshes 60 times a second. I've seen what a real temporal resolution is through Silicon Graphics, so it's been night and day to me since the late 90s. And yes, I'm talking out of my arse, don't you recognize the language? Doesn't make it any less true.
My entertainment system has a nine foot screen that I pieced together with museum grade stretch bars, polyester blend canvas and painted with black widow formula paint. I intended to have a big screen at low cost that is both modular and effective in a variety of ambient light situations. Unfortunately low framerates and screen tear are amplified when the game is 80% of your view. Hence the motion sickness. Hence me waiting for the industry to catch up to the 60Hz standard that has been around a loooooong time (at least on the electronic calendar). Meanwhile I play on my PC with a 360 controller...with no motion sickness.
That's my point. The console industry is playing some twisted bullet-time chicken game. I could have counted the bolts and rivets in both cars by now. PC's keep up because they are modular and allow competition. Right now we have TWO major game console industry giants [with a flat-out loopy like daffy duck on red bull third wheel company] holding up the whole damned evolution of console gaming. I'm fed up with the different attachments, it still feels like I'm getting reamed. All this R&D for disposables is a waste of time and money. Ask Tony Hawk how much he lost on those ridiculous board controllers (I should know since I have one). The only true way to saturate the demographic with a new form of gameplay is to make it standard with a new console at an affordable price. The rest will go the way of the 32x.