Let me give you my view on this based on the XBox1 itself:
Before it was released i was a heavy PC user because 1)the DC was not a sucess and was soon to be discontinued..and i loved the DC 2)The PS2 was overhyped as it's 4MB VRam showed some serious problems rendering high res. textures and it's non-AA was another annoyance.
I had bough a new pc rig for around $1100 in early 01'(P4 1600mhz,512MB,Ge2mx..ect) and since then i bought less then 10 total pc games.
Since then i added a SB 5.1 card($90), two video bds.(4200 and a 9600 pro, total $400) a new mouse and kybd and a few gamepads(because sadly there still is no standard pc gamepad in 04'). That's easily around $1600+ and that does not include other little pc gadgets for games.
Meanwhile the XBox for $300(lol<--this is not high, the 3DO was $799 at launch<--now that is high) at launch gave me DX8.1 graphics(before any pc games did, at that time) a comparable cpu(for a console), a great gamepad for FPS's(the first good console FPS gamepad since the N64's), Live(actually it finally hit in late 02') online which had voice for all games(unlike the pc, where you need teamspeak or another program running in the background), and 480p. Ok..i was used to 800*600 at the least for pc games and up to 1280*1024, but i can easily live with 480p since it had FSAA(unlike the PS2). Add to that no hassles with pc patches/video card updates/defragging to get better load times/clearing out the registry over and over..ect
Shenmue2(which i loved on the DC<-- import Shenmue2)
RTCW(first great Live FPS)
Rainbow 6:3 (and BA)
Deus Ex:IW(identicle to the pc version in 640*480)
GTA3 and Vice City(better overall grfx,control,sound..ect then the pc)
GR1 and GR2
Breakdown(which i actually liked, unlike some other gamers)
And about 20 other XBox games.
And in every case i liked the XBox version over the pc:
-Had the pc versions of GTA3/VC but i went through 8 gamepads before settling on a RS-->PS2 adapter, and still it's in car control was too loose.
Then , I was in heaven with the XBox DP.
-Had R6: Raven Shield for the pc, but online had no voice and while it's character detail is much better, the XBox version had better lighting and other effects. Main thing was Live was so much better then finding a game on the pc version.
DX:IW came out(my fav. FP game series) and was identicle to the pc version(or visa versa) with the ease of plug and play on my new 27" HDTV.
I can go on and on, but the Xbox1 easily saved me over $1000 in pc updates(cpu upgrades/more video cd. upgrades/new motherbd & ps for the higher end ATI 9800 bds...ect), and the only game i regret not having on it now are HL1(but i need to play this on my HDTV in my recliner..not hunched over my pc monitor). Far Cry(coming soon to the XBox), a BF 1942 like Live game,and a good conversion of SOF2(which they shredded up) .
With that savings i got that 27" HDTV($800) which i use in my LR and den(via a cart) and can save up for a PSP..a new bedroom HDTV(26" Samsung comes to mind-->w/720p) and the XBox2.
My only regret was not going with a cheaper pc on 01'(say $500) to get for the normal pc e-mail/net/ect.., and saving another $1000 in those few years.
So i say bring the XBox 2 on, 720p and 1080i for all games, with a DX9/10 GPU and good memory for better textures all around. I can finally say goodbye to all pc gaming forever. (thankfully)
Then i can put that would be new pc and updates(say $2000 every 2-3 yrs) to a new plasma HDTV or better yet more toys for my baby boy