For a Briton, I’d show them the current UK Olympic cycling medals table, and show them the liklehood we would win more, and then show them the track at Manchester - That would really amaze them considering the state of the sport back then.
Ipods and memory sticks.
Mobile phones - back then it was extremely difficult for someone in the UK to own a means of international communication, the restrictions on radio hams were pretty tight.
Most recent cars or bikes, but for a Briton stuff such as the Rocket 3 the Street Triple, but especially the Speed Triple - th elooks would be a revelation, especially for a bike industry that had died back in 1978.
I’d like them to see the south side of my home town - and compare it to 1978. Its completely differant, yes we lost lot of irreplaceable industrial history but what has been put in its place would amaze them too. Actually pretty much most of the middle of my hometown is dramtically differant, for better or worse.
Thiings like the new Wembley Stadium or many of the new soccer stadiums.
They would be impressed with the lack of rubbish, glass and litter strewn about - seriously - back then most cities were run down and scruffy compared to now.
Breakfast television - the idea of putting on the tv and not the radio as you get ready for work would be something of a revelation, not necassarily a fantastic one.
Out of town Sunday Shopping, the fact that almost everyone has a car to get there too.
LCD tv sets, it was something that was dreamed of back then, now its reality, tvs you can hang on the wall.
The balance against that would be the things that they would miss, as cities have eaten up more and more green space and reduced community spirit in close knit towns, especially the coal mining areas.