The store that Miles buys his computer from also stocks the MC-10.
It's in the top right of the frame.
Year of feature (shown above)
That isn't MC-10, it's an Oric 1 from Tangerine. Evidence : Look closely at two things, firstly the thickness at the front. Too thin for MC-10. The keyboard is wrong, look at the second row up, on the MC-10 the Shift key easily is the farthest key to the left, but on the picture you cn see that belongs to the 4th row up. Then look at an Oric picture and compare that the thickness and keyboard layout is identical to that in the picture. If you really carefully you can just make out the classic blue stripe of the Oric going cross the top of the unit. See here for an Oric picture;
Now I'm no Oric expert but I don't think any were sold at all stateside, so very unrealistic.
That keyboard on the bottom with black and white keys looks like a Volker-Craig terminal keyboard.
Definitely an Oric-1. The film was largely shot in the UK - hence the surprising number of UK micros in a US computer store.
Hmm... I think I was wrong about the keyboard at the bottom. Although it's similar to the Volker-Craig, it's probably the keyboard from the Tandy TRS-80 Model 12.