I'll pass on all 3. There's too much uncertainty about the future of Nintendo and Sony, especially. Microsoft on the other hand is really only good for dividends--which aren't even that great. If you really want to make some fast money in the technology sector, in the very short term, then pay close attention to CES.

I'd wait just before the NA vita launch before buying stock, since it's likely to go up after that. Microsoft I would never invest in and Nintendo's wiiU doesn't look very promising.

Nintendo will prove the feeble minded investors wrong every time.

Well following Nintendo might be decent in Q3, but FY END might be bad.  Sony is a given, namely with the negative gain on sale. 

I think the recent financial crisis has shown that investors aren't always correct with their predictions of success and failure. Now would likely be a good time to invest in Nintendo I expect both the 3DS and the Wii U to be very successful. Really, the main thing that's hurting them is the strength of the Yen.

It's a good time to buy shares if you think the company has a hit product coming up and investors aren't clued in to how big a hit it will be. Possible candidates would be Windows 8, PS Vita and Wii U. Personally, I think the Wii U might be successful enough to get Nintendo out of the doldrums, but I don't think it will be a smash hit like the Wii was. I don't expect the PS Vita to perform any better than the PSP did. Windows 8 is a wildcard. It's a really ambitious project, and I don't think MS will quite pull it off, but if they do, the upside will be enormous. It will either carry Microsoft into the mobile future, or trap Windows as king in a shrinking kingdom of conventional PCs.

Kinect, Nextbox... whatever MS does in gaming is hardly going to be noticed by their stock price. Microsoft's huge revenues break down something like:

30% Windows
30% Office
25% Server
15% Other

And whatever portion of that 15% remainder is video games, its margins are crushed by the golden profits of the software 85% because Xbox and Kinect are hardware products. The Nextbox would have to crush it harder than the Wii and take over the living room to substantially shift Microsoft stock value.

Financial results in a few weeks, will be v interesting.

Might pick up some Sony and Nintendo stock for a slightly longer investment, sometime soon as I expect their stocks to slide a little bit further still before things get better.

Microsoft I really don't expect to go any significant bit lower than it is now.

Why would you buy any of these stocks? Sony is practically junk bond status, Nintendo is a one trick pony and Microsoft's core business model is being threatened. Even if they manage to do particularly well as companies it doesn't mean that the stock price will continue to rise, a falling tide lowers all boats just as easily as a rising tide raises them.

Buying Microsofts stock at the moment makes no sense at the moment because there is no indication that it'll rise much over the next 5 years or so. 

As for SONY and Nintnendo -- well SONY's stock is an excellent high-rish high-reward option if your looking at possibily holding the stock for an extended period of time. The stock could drop futher and cause headaches for SONY or it become extremly valuble if SONY gets its act together and has a bit of luck.

With Nintendo it is all about the short to medium term -- the changes in share price based off Wii sales was amazing.(IIRC they were worth ~10,000 Yen during the GC era, ~70,000 yen in early 2008 and now its ~10,000 Yen again) Now it'll be interesting to see if WiiU can replicate it (on a smaller scale ofcourse).