One thing to note is that electronic devices have only recently been permitted to be used - These guidelines from (I believe) 2010 quote the Speaker as saying in 2007:
It remains unacceptable for a Member speaking in the Chamber to be prompted by information on the screen, or for a device to be used as a prompt by a Member — or a Minister for that matter — participating in proceedings.
The latest rules of behaviour are more permissive:
The House has agreed to the use in the Chamber of hand-held electronic devices provided that they cause no disturbance and are not used in such a way as to impair decorum. Their use should be confined to enabling your participation in debate. You may use electronic devices in place of paper notes in debate and may consult them when you are not speaking.
Whether they can be consulted while speaking seems unclear to me - "in place of paper notes in debate" would suggest yes, "may consult them when you are not speaking" [emph. mine] suggests no. I watch very little TV these days, even less of that news/politics, but don't recall ever seeing anyone referring to a device while speaking.
Anyway there isn't a long established practice of consulting electronic briefing notes - and they're not well suited to a process that might be characterised by opening a binder to the section on a particular subject, and reading a figure. Done well indexing is instant on paper. For example if I were doing this, maybe red tabs would be economic*, with "B" for benefits, "T" for tax, or some similar simple notation; I have yet to see an electronic system as effective and I suspect an in-house one would have to be developed at considerable cost of money and time before it would be adopted.
* my system is more complex than the PMQs example seen in another answer, but broadly similar - sticky notes headed "BAME deaths", "Kent lorries", and "Planning reform" are visible and similar tabs can be seen though not read in the 2nd photo of the question.