This works MUCH better with substreams rather than trying to have multiple tablets displaying multiple HD feeds from a wifi router. That's just not going to work well at all. I'd pop the few bucks (under $5 anyway) for TinyCam Pro on your Android tablets just for handling multiple cams easily and easy switching from substream to HD feeds on the rare occasion you'd need it. Even TinyCam Free might work fine for you, or one of the many other IP cam viewers for Android. Just set them up to view substream or you'll screw up wifi for every other wireless device at work and still get lousy framerates on the tablets.
You can also add a small NVR ($50 range) to a cheap wall-mounted larger TV (24" or whatever) and run a wire to it. For an example that you can tuck in behind the TV, search Amazon for "super mini nvr". Then you'll have no issues with bandwidth and can view HD on a much larger screen.
(I'm not sure if you were responding to me directly or dance, but I'll respond as if you were directing this to me in case discussing this helps other folks)
I agree with you. Tiny Cam is my preferred app and I thoroughly enjoy it. You made a comment about it murdering wifi for other devices... typically that'd be a concern of mine. But I mention this is for my night stand, so it's late at night when everyone is asleep. If it'd murder the wifi for everyone else (yet be okay for me), that'd still be fine.
But yes, it's clear that as I ramped up the number of cameras, it began to take a toll. I was too exhausted from installing the last cameras last night to bother with switching the tablet settings around.
The other factor is I only have a 7 inch tablet, and the likelihood of me ever buying another tablet again is about zero. Six cams on a 7 inch tablet is very meh. 3/4 was much better. I have an old 12-13 (or something) inch laptop that I think I'm just going to plop on the night stand. Turn it on, auto login, auto launch my client upon login, and set the screen to go dark after 60 seconds. In the night, hear a noise, move cursor, boom - instant feeds (since they're streaming in the background with the client running already).
The NVR software I use with its corresponding client I quite like (Bluecherry). This may be a feature others have, I'm not sure, but I can set up everything in a grid to view the live feeds. What's nice is I can either run them in full bandwidth mode or low bandwidth, or I can adjust them individually with a quick right click. That way if all is quiet except one of the kiddos is stirring I can full bandwidth that particular frame and low-bandwidth the rest. The low bandwidth mode gives more of a "sub stream" oriented feeling to it, so it'll be much more sustainable on wifi -- even 2.4 GHz.
If I happened to have a 10" tablet, that'd be perfect and I'd just utilize that. With that being said, Dance, I'd have gone with a 10" tablet if I could do it over. At the time I bought my 7" tablet it was for general purpose use, not cameras. When cameras came on the radar it just kind of fit since I stopped using the tablet (I'm just more of a laptop guy). In my case, having an old laptop laying around, it's difficult for me (personally) to justify a new purchase instead of using something I already have. Since you're talking about purchasing new, a 10" tablet is the route I'd go.