Nothing will be changing for your account (logins, settings, etc) but the hardware will be improved. Here's what the hosting company said about the migration:
Why are we doing this?
The upgrade offers many benefits such as safer and more secure environments, increased stability and overall better quality of service.What will happen during your VPS server migration?
During the migration, your VPS server will need to be offline while we migrate your disk storage data. This means your website(s) will not be available. The migration will not require a change in your IP address or server name. No data will be lost in the migration.If you experience any issues following the migration, please let me know and I'll address them as soon as possible.
Again, sorry for the inconvenience of website and email downtime, but the service improvement will be worth that inconvenience going forward.