Of course, tech has it's place, but it's use should be to enhance the classroom teaching and not replace it. It also needs to be properly planned and kept relevant and up to date.
I note that interactive whiteboards are going out of fashion again these days - so they've just been a fad/gimmick for entertainment rather than education.
At our son's school, they have various systems via their website. Such as show my homework - great in theory and launched with a lot of enthusiasm, but six months in and many teachers have lost interest, so the kids are now confused with some teachers using it and others just setting homework in lessons. They scrapped the homework diaries, so it's a real fiasco and the kids havn't a clue what to do. Some teachers even set homework via email - a third different system!
Same with their "VLE" - some subject heads are keeping it up to date and relevant. Others threw lots of effort in a few years ago, with dozens of webpage links, many of which are now out of date or broken, so as much use as a chocolate fireguard. Some dept heads never made any effort at all with virtually nothing on. Others are simply out of date, such as having end of year revision notes which relate to prior year end of year tests, but don't say the year so kids use them and then find out they're not relevant to the actual tests they're sitting!
Some topics just aren't suited to being done on a computer or tablet. Take maths - fine for mental workings, but doing it on screen you tend to lose the habit of writing down your workings, so potentially mark-losing for exams.
Nothing worse than a lazy homework being set such as "research ABC" without giving any guidance as to what websites to use, how much detail, etc. Very easy for a kid to go into far too much detail, stray into the wrong areas, etc - they need clear boundaries otherwise it's not only time wasting, but potentially counter-productive as they may answer questions in tests in the wrong level of depth and lose marks because their answer isn't what is on the marking scheme.
Tech needs to be controlled and monitored and only used where it enhances the teaching, not as a lazy replacement.