They would at least represent significantly better values. Outside of Core M-based entry level Surface Pro, all new machines would use Intel's quad-core eighth-generation Core processors. Microsoft may not be so stingy with memory either. Although the Core M-based Pro would stick to 4 GB of RAM, all other configurations would contain at least 8 GB of RAM – no more top payments for a system that is struggling with even a moderate workload juggling. If there is a complaint, it is that Surface Laptop 2 may be supplied with a modest 128 GB SSD.
These innovations are probably not the only new Surface hardware at the Microsoft event. But if all goes well, the scoop suggests that you will not see the company make any major changes to every aspect of its setup. In some cases it can be satisfied with speed boosts. That may still be better than what you have seen in the past. Microsoft did not touch the Surface Pro and entry Surface Book between their 2015 introductions and 2017 – here the devices would in any case remain reasonably up-to-date between important updates.