I bring my own iPad to every meeting and use it for church purposes when I'm there. I wouldn't have even thought about asking someone else to buy an iPad or a laptop to use for my calling. I kind of struggle with the idea of having something like that at the church that would only be used a few hours each week. Seems like a waste. And if I brought it home (to do calling-related work outside of the church building) I would find it too tempting to also use it for personal stuff.
So, on balance, this seems like something where a member would bring his own tools to use for his calling. Having said that, I can see where someone would think they can't afford one (if they don't already have one) and maybe someone thinks it would be too difficult to keep confidential church stuff secure on their own, personal laptop. But people have managed that for many years. My guess is you could find countless examples of people using their own laptops and tablets in their church callings (without a second thought about "consecrating" that usage) and very, very few using a church-provided laptop or tablet for a stake or ward calling.
My real name is Greg Anderson.