Many of the '70s into early '80s bikes had more flexibility built in -- even the race models (often) had quite a bit of tire clearance, etc. Moving into the mid-80s, you tend to see shorter chainstays and tighter clearances all around. But if you're happy with 28s for the riding you do this should be a great bike. If you get itchy you might even be able to do a 650b conversion down the road and fit 38s. I personally have gotten spoiled on riding fat tires, but if that were not the case I would be tempted by a bike like that one.
Other considerations -- do you want to mount racks and/or fenders? Does this bike have eyelets to facilitate this?