do you think in the coming next gen gaming console nintendo and M$ will start to adopt the blu-ray as their media disc. or still remain using DVD's or come up with just enable the users to download the games.

discuss

I was planning to answer yes, but there is not even an answer for that.

Wii2 could eventually come without Blu-Ray, but PS4 and 720 will definitely (but there is no answer for that as well).

Depends, how much does a Wii disc hold?

Only for the PS4 as Sony, if I am not mistaken, owns a huge chunk in the blu ray business and gets royalties for entertainment using blu ray format (I believe I got this info from one of Squilliam's posts).

For this reason, I don't see the NextBox and Mii using blu ray. Why fund one of your main competitors?

HD DVD for the NextBox and Mii is my safest choice, but we may be surprised with both Microsoft and Nintendo. I could see Microsoft trying to position Live as the console version of Steam and Nintendo doing it's own format, but this is just speculation.

you realise Sony also own a chunk of DVD right you know the format that everyone other than Sony is using? Sony getting a fraction of disc royalties again is unlikely to even come into the picture when Microsoft and Nintendo are deciding on a format. Also Sony and Microsoft actually do a lot of busyness together in the computer and cell phone  areas so Sony is already funding Microsoft by buying Windows and win phone 7, and Microsoft owns one of the commonly used codec's for Blu-ray movies, tho they had a lot more involvement with HD-DVD and would have gotten a lot more royalties from that if it had won. So no Microsoft wouldn't have any problem using blu-ray if it made good business sense which if it's market share continues to grow it will. 

As for Nintendo they have used a modified version of the current disc format for the last two generations and I don't see that changing so a slightly modified basically Blu-ray but with less royalties disc format will most likely be used.

HD-DVD is dead and to be used they would have to make all the players and discs themselves and while that would have benefits they lose the advantage of economy of scale that is gained by using a format compatible with the current standard. 

So in closing most likely all three will probably use blu-ray in some form or another.

I don't think Blu-ray is needed for next generation, I mean, most PS3 games use like only half of it. I think Nintendo will come up with other kind of media to develop games, like some DVD with 12 GB or something like that is enough.

I think it's highly likely PS4 will have a 4-8x Blu-Ray drive, maybe even 12x. The Blu-Ray is still too young to be replaced, and Download-only  will have to wait for the next generation.I think the PS4 will use a lot of cloud-computing, though.

Maybe the Wii 2 will also use Blu-Ray, but I doubt the 720 will use Blu-Ray. I think MS will approach a digital only console. The recent developments and comments from high horses already show thatd development for the 360.

No, I did not know about Sony owning a chunk of the DVD format and collaborating with Microsoft outside of video games. I appreciate the information.

I think a blu-ray variant will be used for the 720.  

However, for the 'Super Wii', I think it will use a propriety format based off of HD-DVD .  I believe this because a single layer HD-DVD can hold 15gb, with dual layer holding 30gb.  Compare this with Wii DVDs which can store about 4gb for single and 8gb for dual layer.  To my understanding, no Wii games come on multiple discs and only 3 are on dual layer (SSBBrawl, MP Trilogy and Metroid Other M, though I'm sure The Last Story will when released).  A roughly 4x jump in capacity should be more than enough for the Wii's successor.  The jump from GC to Wii was only 2x and that's worked out fine, plus several GC games came on multiple discs (MGS TS, REmake, ToS, BK, etc).

I expect PS4 to use blu-ray, Wii2 to use a proprietary high-capacity disc (maybe based off the HD-DVD?) and X720 to go the both the download way and DVDs for installing games.