Yeah that sounds about right, definitely not going to beat HDDs for now by far, I can also see Disc drives becoming less relevant as we move more into the DD space. I might just go DD only on Wii U and stop buying physical copies altogether for future purchases since USB2 HDD is still faster anyways(Already did for Monster Hunter and Need for Speed.) Will also do the same for PS4 if I ever buy one.

Why would that be loud?  The disc drive in my PS3 is always quiet, and I can never ever hear an HDD...

Because feeding the ram would make a constant streaming of a lot of data necessary and this will of course be louder than now - the drive will spin faster and if it really streams data directly to ram all the time it will also produce more heat.

I still doubt this scenario, nextgen will use hdds more than an odd.

It depends on the drive. The 12x DVD drive in the 360 spins at constant ~ 7500 rpm.
The 5x Wii U drive spins at constant ~ 4100 rpm. (no install, 1 minute load times in lego city undercover)
The 360 drive spins less then twice as fast, Wii U is silent, 360 sounds like a vacuum cleaner.

Loudness is not a problem, read and access speed is. Hopefully next gen comes with faster HDDs. 5400 rpm again will suck.

Thing is my drive (360) only exists for installs and initial "disc in tray"-check so... But rotating speed is only one factor - vibrations can also be loud is the design of the whole console is bad. Btw, the 360s is not really loud, I think. But that's not the point.

Of course access speed is crucial and read speed also and this is exactly why I think both consoles will use the ODD just to deliver the game, not to play games off it.  ODDs easily break when used too often and too much, they are the slowest part of systems right now and overall outdated (to me, at least).

I don't see the bluray-drive in ps4 streaming directly to ram, this would be a very bad idea.

Nah. 1Gb is enough, you do need a fast storage medium though and a light virus scanner. (Like nod32, written in machine code, uses bugger all ram.)
My grandmother has 1gb of ram in her Desktop, running Windows 7 and it's more than enough for simple photo editing and printing, word processing and emails and some light web browsing.
However, your parents also have a laptop, 99% of the time they have a slow 4200/5400rpm hard drive, rather than the 7200rpm drives that are common place on Desktops, it's also why most of the time systems feel slow.

Mechanical Hard Drives should be banned as primary storage devices in PC's, period.

Good for backups man :P HDDs technically last longer and data can be recovered much easier lol. I wouldn't use SSDs for my server other than the main drive for faster boot in case of failure which is backed up to one of the HDDs too.

Over the years I have had way more HDDs fail then cd/dvd drives. I watch tons of movies on ps3 and plenty of games use the drive (it's used every day) and I haven't had any problems with the drive.

The ps4 is getting a cav drive, meaning less wear and tear as it doesn't have to change speed all the time when reading different parts of the disc. The 27 MBs though put at the outer edge will be a good help next to a HDD install. Plus it's pretty pointless to put cut scenes on the hdd, waste of space. All bits help, for example for racing games read the track data in one big chunk from blu-ray, while at the same time read the car data and other random access bits of the hdd.

The 360 did have some bad drives at the start. I still have a 20gb phat relic, one of the first ones with HDMI. That dvd drive is bad. I would never want to watch a dvd on that thing. (My HD-DVD drive is silent though, plays dvds too)

Early on, Microsoft had a "special" where they sold refurbished 20Gb drives for $20, so going by that, they must have had high failure rates on the 20Gb hard drives, ended up buying one for my Xbox 360 Core machine which is incredibly old now, but works fine.

As for playing back video, PC is your friend, let the PC transcode it and send it to the Xbox 360, it's a good way to run Bluray through the Xbox too, plus you get around the noisy optical drive. :)

Wow.. I seriously advise you to spend less time on forums and more time brushing up on your English. I pray you're not a native speaker.