My take is that is the groundwork for taxing all internet purchases.
Suppose you buy a new TV online from New York. No sales tax. But you are supposed to pay use tax at the same rate of the sales tax. Only businesses who declare the asset pay this tax.
1099 Part 2. My understanding of a 1099 is technically the employer is on the hook to pay social security withholding. The issuance of the 1099 tracks who received the income or sales payment and who should pay the required estimated withholding. Now if the guy you 1099’d flakes out and skips without paying, I believe the IRS can come after you for the money. Maybe SK can chime in here.
So with this new use of the 1099 the IRS can track who received this new TV and by sharing data with the states can determine if the use tax was collected. Possibly deducting it from any Fed funds owed to the state.