I think it will take off when the technology is better. We need always-on wi-fi and NFC phones IMO before it takes off big time, but when both of those are in place, I can see it working well.
At the moment it suits sports betting more, as you only need to be online for seconds to place a bet. With poker and casino, you require a constant connection and in the UK that just ain’t happening at the mo, unless you are at home when the PC is a better option anyway. And in hotels and stuff, most ppl have laptops.
Mobile gaming will work for ppl “on the move” better IMO but every time you hit a tunnel on a train – bang…you’re gone, and it’s too slow and fiddly to bother reconnecting I find.
My feeling is now is a good time to get in so you’re up there when it finally becomes bigger, but that time may be 2 or 3 years away yet in most countries. I also found (playing MG mobile), you tend to bet a bit lower, plus it’s slower, but again, that will probably change over time.
I like the concept, but the industry is ahead of technology – a good thing in many respects though, providing the companies supplying the services can survive the period required for technology to fully catch up.