I want it to succeed, and I want to get one (although I won't be buying one at launch), however I reckon it will fall somewhere between WiiU and Gamecube numbers, which I wouldn't call a success.
There aren't enough games announced for how close to launch it is. Especially console exclusive titles (not WiiU ports). The online seems a mess, did they really have to make the one NES/SNES game that comes with the subscription only available for that month? And it's overpriced and underpowered for how much it costs (and those accessory prices)
For me to feel sorted with everything with Switch I'd need to get this:
Plus an SD card taking it over £500. Granted I wouldn't feel the need for the second joycons/pro controller day one. But I'd want to thet them sooner rather than later.
For the same price you can get this:
I don't really see a situation where anyone other than the die hard Nintendo fans (of which there aren't enough anymore to make Switch a success) would choose Switch over the other cheaper, more powerful consoles.
Even as a current PS4 owner, prior to the reveal I thought Switch would be my easy first choice for a second console. As it stands a £200 xbox one S with its library, backwards compatibility and UHD Blu ray support seems the more appealing.
I hope I'm wrong and Switch is a runaway success but at the moment I can't see it happening.