Haha, I don't think you know how this stuff works. How much is the Surface Pro 2 with the 512-GB SSD? $1,800. A big part of that price is the SSD--one that big is $300+. A 500-GB HDD is probably about $50, so that change alone pushes the console to $800. Now, of course, that's not the only problem.
Go put a SSD in the Xbox One, and see what you get. Well, you kinda can't, but you can do it with the PS4, and people have. What they got was minimal speed improvements from a HDD to a SSD. Why is that? The motherboards in these consoles use SATA 2, not SATA 3, which is twice as fast (and the port you put a SSD into). The SATA 2 port would bottleneck the SSD, and that's what it does on the PS4. So, that means you're also going to have to upgrade the motherboard, which probably runs them another $50 or so, meaning we're now around $850. Now, if you want, I'll go give you that $50 back for the Blu-Ray drive, and we'll be at $800 again. It might be a bit more than it's worth, but I'm OK with it.
So, now you have your disc-less, SSD-based Xbox One, and it's $800. Now, do you remember that always-online DRM check Microsoft had? Do you remember how many people were pissed because they wouldn't be able to take their consoles offline? If you go disc-less, you're going to need a quality Internet connection to install your 30-GB+ games, and people aren't going to like waiting 2 days for Forza to install. A 3-Mbps connection is what I had until last year, and on that connection, the 35-GB Forza 5 install would have taken SIXTY-SIX HOURS. Of course, that's at peak speeds, and it also means I have my Internet connection crippled for 3 days or more, waiting for one game. Oh, and considering I also have Titanfall and Kinect Sports Rivals, better make it a good week before I can play online.
I guess the solution there is delivering games via USB 3.0 flash drives, but a 64-GB 3.0 flash drive would probably add $5-10 to the cost of each game, because without a disc, that's the only way you're going to be able to physically distribute games. So now, you're added $300 to the cost of the console and $5-10 to the cost of each game.
Oh, and let's not talk about when the warranty ends. Your SSD fails, for whatever reason, and now you've got to spend $200+ to get a new one (I figure that'll be about the price of them once these one-year warranties die). So, replacing the Xbox One's failed SSD is half the cost of the PS4. I won't even get into what happens when you have to get a new SSD in 3 years because the included one is full.
Hopefully that all covers why this is irrational, impossible, and why it would absolutely cripple the gaming division.