A "digital nomad" is someone who can move around and isn't tied to a particular location for their work etc (e.g. Wikipedia) and as you likely know already, we are now in an age where someone can carry out 'gig' based work online, accept the work they want in a freelance lifestyle, etc.
Actually for some companies, they can even have "digital nomad" employees (as long as they are available at the needed times) as regular staff!
'Haze' is unclear and doesn't have a definite meaning in this context but I would take it to mean a kind of halo, nebulous nature, or perhaps a "pulling wool over the eyes" (i.e. intentionally making something obscure to someone else) where the author is saying that it is not really a well-defined term. It could be a "fad" (trend) of the moment. 'Haze' is that weather phenomenon where you get a vague sunlight through fog and it makes everything impossible to see -- make of that what you will!
For me it also has connotations of 'halcyon days' in its capacity as something that's very much "of its moment".
If you are totally unclear what this phrase means at all (and I don't blame you!) I would re-word it in my mind to something like "In the current 'era' where people work remotely, on-and-off and have to be mobile and always connected but without maintaining a physical presence in any one particular place, [especially because this is a trend in the last few years], laptop characteristics such as size and weight are important".